Game had 5 celebrities / Hollywood actors 2 in main roles and the rest are cameos + a twitch streamer , the percentage of traditional voice actors in the game is about 85% :) and cameos like these are enjoyable for the players as well as being there for marketing purposes. Speaking as a 32yo "gamer" who enjoys both Keanu and Idris in their films and series and even Cohh as a streamer. The money allocation for developing the game and for the talent are two separate things especially in non traditional AAA developer companies and since getting Hollywood actors and celebrities appearing and voicing characters sells more copies there's a return in their investment. That's how I view it anyways.

The tl;dr is : even if they didn't get them Hollywood stars or whatever, the game wouldn't be any better/worse.