>I wouldn't say these anti-cheat tools that come with Valorant or LoL are from dubious origins.

You are talking about Vanguard, developed by Riot which is owned by Tencent which is a Chinese company? China has demonstrated enough grip on companies over the years that anything China can directly influence is dubious. China can decide to do something with the installations and has the power to do it in secret. It is significantly harder in western democracies. The relationship between the state and the private enterprises is entirely different.

Valve's VAC is not in the same league with Vanguard from a technical point of view (it is not even kernel based if I'm not mistaken). I would not let that slide either if it was though.