Wordpress is superior not because search engines favor it, but because of plugins. On page SEO in Weebly (and I assume WIX, though I have no experience) means learning and editing the raw HTML. For wordpress, you let a plugin handle it. Want to add automatically add meta data to every page? Plugin. Want the site to load faster? Plugin. Automated caching? Plugin. Want to add google analytics? Plugin. Add social sharing links? Plugin. Need to remember to promote new content via social media? Plugin. Want to recycle and promote older content? Plugin. ... You get the idea. More on reddit.com

Freedom (different ways of doing: Gutenberg, Classic Editor, Custom Fields and Custom Post Types, third-party page builders like Elementor, Block builders, etc.) Open-source Huge helpful and competent community Great support for most plugins (free or paid) on the official forums WordPress is free You can do a lot with only free plugins if you really want to Paid plugins are often subscriptions BUT you mostly aren't forced to renew them (of course getting updates is better but if you really want to you still can continue to use the plugin without updates without paying) There are lifetime deals on some paid plugins sometimes, which is a blessing Extensible (build on top of WordPress yourself, create your own templates/blocks/plugins/themes, use it headless, etc.) Great free SEO plugins exist (with free Yoast SEO correctly configured you're already set for basic indexing without needing anything else really, it gives you everything you need: a sitemap.xml, seo tags, open-graph tags, cover images, etc.) You really OWN your website (self-hosting) and aren't depending on a builder (even if it's unlikely: what would you do if the company behind Wix disappeared tomorrow?) More on reddit.com

Of the ones you mentioned, Wordpress. Only in WP you have access to files in case you need to do something extra than just clicking. Besides wordpress you have your own on your hosting, and the rest you rent so it is not even yours. More on reddit.com

Speaking as a professional WordPress dev (and thus both knowledgeable on this subject and, clearly, completely unbiased), I would strongly recommend using WordPress over any of the other options you listed. They really shouldn't even be considered in the same category. WordPress is a Content Management System (CMS), which is a piece of software that can run anywhere, developed as an open platform by the community. Whatever you make in WordPress, you fully own it in every sense of the word. If you don't like your hosting company, you can pick up and move to a different one. If you don't like your theme, you can choose a different free one, buy one, make a custom one, or hire someone to make a custom one. If you're not satisfied with the features it includes, there's a huge ecosystem of plugins, developers who can customize it for you, etc. Wix, Squarespace, and Weebly are all hosted commercial services that provide a closed platform. While you technically own your content, it's all locked into their proprietary systems. If you decide down the road you don't like their service, your only real option is to build a new website from scratch. If you don't like their themes, or the features they provide... I don't know the exact degree of customization each provides, but it's generally going to be pretty minimal. Hosted commercial services can't have customers mucking about in their code. Personally, I would never consider letting my content be locked into a closed commercial platform, so I'll always use and recommend an open CMS like WordPress. That said, if you don't like WordPress, it's certainly not the only CMS out there: Joomla, Drupal, and Typo3 are all reasonably popular options. However, WordPress is far and away the most popular — it runs ~30% of the Internet. That's not necessarily because it's the best option... But it is because it's one of the easiest CMS's to set up and use, and has the largest ecosystem. More on reddit.com