In the short term the answer is a clear “yes”, as it allows players to play nearly all Windows games on Linux without modifications, and game developers to ship their games on Linux without any extra costs.
How does that make Proton bad?
It’s the dual-edged sword of making it more accessible now with a workaround, which disincentives developers from building with actual support in mind.
So Proton is allowing more people to switch to Linux for gaming, which is good! However, instead of putting pressure on developers to make Linux versions of games and software they can just use Proton, so they will continue making only Windows versions, which is bad.
Wow, now you’ve got me imagining this weird future where everyone has switched to Linux for desktop use because of how bad windows has become, but developers still make games only for windows because of Proton. 😵💫