To be fair, there's also developers that technically release an actual native linux build with bugs and then offer zero support for it. At least games on Proton still get worked on by the Proton developers.
And often it only works on the 2016 LTS release of ubuntu because they depend on specific packages that happen to be on that version of ubuntu and any support requests get ignored with the response "We support ubuntu 16.4".
At least when you use proton you can whinge at a whole community of developers and typically one of them will care enough to fix it. These days I find for a lot of the games I play, proton is literally flawless to the point if you didn't tell me, I wouldn't know it isn't native.
And often the "native" build is using the developer (or porter) closed source buggy wine-like compatibility layer (sometime seven using Windows PE binaries directly). Wine is usually superior especially in the long term.
Some native ports are high quality though, like everything Croateam does and a some of Feral ports.
At the end of the day the only thing that it is important is support. Community supported wine/proton is vastly better than an unsupported "native" version.
