It handles dependencies, and it makes windows games transparent to Linux users (you don’t even know it’s being emulated). In fact, from my understanding, some games run better than in windows in some cases

Wine is not an Emulator

If you’re using controllers, steam input also makes games a lot more playable.

haven’t had issues using ps4 controllers without Steam. I even use it in Runelite

If we’re talking about the Unix philosophy though, what one thing does the Linux kernel do?

Be the kernel, it’s the only constant between separate deployments