It mostly stopped piracy for me, but occasionally I’ll want to try a game but not want to support the company, or try a game I know I’ll hate just to see what they did.
I also pirated Starfield, which I technically had access to through GamePass, but it couldn’t be modded. (I also ended up hating it too.) I’ll probably be canceling GamePass though since I’ve switched to 100% Linux since then, and Windows has made it impossible to use with Linux.