Hell when you make the best product in town why not spread the love around. If EA or 2K were competent at making baseball games, Nintendo and Xbox gamers could enjoy playing baseball without using Sony's talent.
In the case of Nintendo, if EA even bothered to make a Switch version of MLB it'd just be a no-effort rehash of an old version, not that a new version wouldn't also be crappy per their standards. 2K probably would make a decent Switch MLB game. Nintendo made the best baseball games on its own hardware back when they still had majority ownership of the Mariners.