If that studio’s developers are most familiar with Windows tools and APIs, then the path to a successful game would be letting them use those, at least to begin with.
So you’re saying, if Sony or Nintendo made a new console and contracted an outside developer, that developer should develop for Windows instead of the new consoles because they are unfamiliar with the new tools and APIs? Why even develop using Source Engine (2)? Why not also give in to a total Unreal Engine monopoly because that’s what every game developer knows? CS2 on Steam Deck is bad right now.