"When we were looking at who potentially could fill the shoes of Geralt," said Hissrich, "There is a physicality that has to be present… You need someone who you can imagine can excel at these action scenes, who has such a physical presence that they could be both intimidating in the story, but also, Geralt has a huge emotional side as well… What I really loved about Liam's work that I had seen is that he was able to organically blend those two things."

More: https://www.thepopverse.com/tv-witcher-season-4-liam-hemsworth-henry-cavill-season-4-geralt-of-rivia-netflix/

Henry Cavill, who played Geralt of Rivia in The Witcher, announced his departure from the show for season 4. Cavill stated that he had an amazing journey but would not continue his role, setting aside his medallion and swords.

Some of the reason why Henry Cavill is leaving the show is:

Differences in vision between Cavill and the show's writers

• Henry Cavill is a fan of the original Witcher story from the books.

• Some of the writers on the show are not fans of Andrzej Sapkowski's books or CD Projekt Red's games.

Conflict in Henry Cavill’s schedule

• Particularly related to his role as Superman, was initially rumored as a reason for his departure but was proven false.

A quick update: Henry Cavill is set to take on the lead role and produce a TV series based on Warhammer 40K for Amazon.

For further details do check out https://celebiograph.com/why-is-henry-cavill-leaving-the-witcher/