because the alternative is server-side rendering of every frame, which would introduce unacceptable latency to input and also likely significantly reduce graphical detail, given the existing huge investments in consumer rendering hardware that have not yet been duplicated serverside
google stadia exists. nobody playing competitively uses it, and that's exactly the demographic that cares the most about anti-cheat
and, it still doesn't prevent computer-assisted input
Speaking as an avid Stadia user, I think this has a lot more to do with Stadia's library being garbage compared to the non-Stadia options. I can't imagine a reason an e-sport pro would want to go from the entire competitive ecosystem as a choice to just what's on Stadia. Even for casually competitive players, there's a massive lack of mainstream competitive titles on Stadia. Maybe the latency input is the problem but it seems like a big assumption with how miniscule the library is.
I'm very much a competitive fps player, i have low latency to the closest stadia server and I'll tell you: It's absolutely unplayable for me due to the input lag. I'm normally in top 1-2% and on stadia I'm closer to top 30% it's a huge difference.
google stadia exists. nobody playing competitively uses it, and that's exactly the demographic that cares the most about anti-cheat
and, it still doesn't prevent computer-assisted input