Are you arguing that cheaters should be allowed to run rampant in multiplayer games purely because that is how they want to use their software? Because at that point, there is no reason to even have multiplayer games.
I get the desire to go back to community hosted servers, but there are real tangible benefits to modern matchmaking systems, particularly for games with a competitive focus.
1. Self hosted servers. Let communities do their own moderation.
2. As part of #1, cheating/sandbox lobbies.