Duel_ClipWhy's that? CS Faceit has that type of anti-cheat and while it isn't perfect it works a lot better than vac and is much faster & easier than reviewing demos. I personally wouldn't mind something like that being implemented and don't see an issue with it.
I personally have a great dislike of invasive anti-cheats, and some of us run operating systems that have serious issues even running them. Also, this was before my time, but I'm fairly certain when ESEA ran TF2 someone snuck a Bitcoin miner into the client at one point. That's unlikely to happen with a hypothetical RGL client, but I'm still wary.
Really, I'm not sure why invasive anti-cheat is even needed in a relatively smaller league that supposedly has people reviewing demos weekly. There's not a ton of money on the line anyhow, I don't want RGL to get giga access to people's computers over it. Also, if RGL supposedly can't afford to host demos, they definitely could not afford to run a system like FACEIT.