Completely reasonable, unfortunately. I know how much work goes into just using a single Linux device daily. Supporting software on 100+ slightly different flavors of OS must be a nightmare and is bound to cost a game developer money.
And they didn't even touch on the kernel level anti-cheat issues, the anti-corporate attitudes, commie philosophy, unappreciative community, or the fact that hard core gamers are going to stick to Windows / Consoles. Projects like Ueberzug were abandoned because of harassment, and unrealistic expectations from them -and it was a dependency for a few of my favorite programs at the time ( like LF, and ucollage). IOWs it was the so called community that was behind a lot of my wasted time trying to fix things. -It's just not a market I'd want to cater to.