Seems like you moved the goalposts pretty far... Consumers using Linux has shot up pretty dramatically this year, at least in my social circles. I count at least a dozen, non technical friends who decided to drop windows. That number has been zero a year for decades.

Game devs working in Linux is always a lagging indicator. Once there's a market share, they'll go there. Once it's the preferred os for people, you'll be able to develop on it. Games is already an incredibly risky market sector.

Instead, I encourage you to look at blender. It's gone through a "cute hobbyist/prosumer tool" phase and is now in the mega million dollar movies and games use it as their primary tool. Desktop Linux is on a similar curve thanks to Valve. If enough people start using it at home, industry will flip over.