It seems that it’s insinuated that a good manual grinder can produce the same grind quality as perhaps an $800-$1000 electric grinder due to it not having any of those electric components. How much did the hand grinder cost? If it's a $600-800 hand grinder, yeah, you'll probably see approximately equivalent performance. If they're insinuating that a $200 hand grinder is equivalent to a $800-$1000 electric, I'd suggest not paying a ton of attention to what that particular influencer insinuates. As a general rule of thumb, the combination of motor, gearing, and electrical certifications costs between $100 and $250. In most cases, you're not getting more value than that by choosing manual over electric. That does get a little more complicated from there. Value decreases as prices climb - a $800 hand grinder is not four times better than a $200 hand grinder. Diminishing returns kick in, and while the $800 is definitely meaningfully better - it's not better to the tune of its whole price. Upgrading from a $100 grinder to a $400 grinder is a big jump in performance, but upgrading to a $1200 grinder is not going to be nearly as huge a change. As price points climb, it costs more and more for smaller and smaller gains in performance. This can mean that inexperienced palates can over-value the lower price point upgrade and under-value the higher one, because the jump from $100 to $400 was much more apparent and more memorable, while by comparison the jump from $400 to $1200 was kind of underwhelming - so "well they seem kind of equivalent" can happen. Further, most folks don't want to drop huge dosh on a premium grinder and have it show up looking cheap and flimsy - so most grinders (hand and electric) are also putting more and more of the purchase price towards aesthetics and design as prices rise. This loss of price/performance efficiency is really the case when we get into seriously expensive hardware, because there's another factor to consider - the size of the market for that grinder. There are way more people looking to buy a $150 grinder than a $1500 grinder - which means that the cheaper grinder can be manufactured in far greater quantities, spreading the 'fixed costs' of the product across more units. If it costs $100,000 to develop, design, and set up manufacturing lines for a grinder - spreading that across 100,000 units is $1 each, while spreading that across 1000 units is $100 each. Having a bigger market means more savings for any individual consumer. The market size issue means that for very top-end hand grinders, you lose almost all of the efficiency compared to electric, and in some cases invert. There are way more people looking to buy a $1500 electric grinder than a $1300 hand grinder. ...Once you're spending that kind of money already, most consumers would prefer to sink the extra $200 and not need to crank themselves. Last up, in those same ultra-high-performance / high price grinders ... hand grinding is inherently less consistent. A person will be rotating the burrs at uneven and inconsistent rates, with variable amounts of force, and your pressure on the handle may cause tiny changes in alignment. Powered is capable of vastly more consistency. The motor rotates at a fixed 60RPM with a fixed 10 N⋅m (numbers are for example, I dunno what real numbers would be) of torque, and the burrs can be machined with that known speed and force accounted for and targeted in burr geometry. Once you reach peak performance hardware, machine-powered is the better value and performance due to the combination of mechanical consistency and far larger market size. What about manual hand grinders give good grind quality compared to the electric grinders of the same price? Is it the burrs? Because you cut down on the cost of the electric components you can have better burrs? In the cheaper price points where this gap is clearest, yes. If you spend $200 on a manual grinder vs. $200 on an electric, for the latter 1/2 of the purchase price was just the electrical, so only $100 was quality burrs and alignment - where for the manual, nearly the whole $200 price was just burrs and alignment. So at that price of the electric - are you just paying for workflow and convenience? Mostly, yes. Certainly at the price points we're mostly dealing with here. Hand grinding is kind of time consuming and takes effort, and just pushing an 'on' button is easier and faster, while leaving your hands free for other tasks.
Yeah basically, you're paying for complexity, name, parts, and convenience. There's a reason why barista championships use a lot of hand grinders in competition. Especially now that hand grinder prices have dropped so much. I think an 1Zpresso J-max or zp6 can make coffee equivalent to the highest electric grinders, you don't even have to shell out for Commondante anymore, and a Kinu Phoenix is only a couple hundred bucks and produces world class espresso as well. Hell, an X-Pro is often seen as an equivalent to a C40. One thing you don't get is flat burrs, so there is going to be ceiling as far as clarity goes, and I haven't tried a zp6 myself but I've heard something like ULF on the EG-1 will be cleaner, but I don't even think most people want that flavor profile. I pay for the electric flat burr grinders because it is a pain in the ass to grind manually every time, especially first thing in the morning, but if you truly don't mind then you can certainly get some absolutely top-tier grinds for a fraction of the price.