Not having cheaters ruin my online games is an improved user experience.
For many artists, not having their art copied would be an improved user experience, so should the OS prevent you from copying files tagged as copyrighted? Windows Defender already removes torrent software and gives scary warnings for LibreOffice [1] so it's not a big step.
[1] https://baronhk.wordpress.com/2021/09/13/microsoft-defender-...
If a "trusted developer" is one of the heuristics, then any kind of honest anti-virus should trust major free software developers/apps to at least the same degree as someone like Adobe or Riot.