Yeah, it's annoying to not have it native, but having Proton also means there's just one thing to maintain support for. If a major system library changes you patch Proton, not a thousand different games and programs.

Until Linux gaming starts making use of some form of standardized containers or maintain proper LTS environments there will always be a need to keep each game updated individually to maintain compatibility when old libraries gets deprecated. About time somebody gets that going (and no I definitely do not just mean flatpack)

Edit: apparently there's a Steam Linux runtime based on containers, maybe if we can get that standardized it would help