If you purchase a studio, that's also not "bad moneyhatting", because you've bought the studio and there's no reasonable expectation that you release your own titles on a competitor's platform.
That's a pretty rock solid position, I think.
If a video games console manufacturer buys an entire publisher or developer then they have the right to make sure every game that comes out from that publisher or developer is exclusive to their console. That's how the market works.
There's absolutely no concrete evidence that's what Microsoft will do with Bethesda's games though. It's a perfectly reasonable thing for them to do, if they feel that's the best way to maximise profits. And it's just as reasonable for them to publish Bethesda games to Playstation if that's what makes the most financial sense.
Threads like these are so weird and sad because people start making these bold claims about what definitely will or won't happen in the future, as if they have some insider knowledge of how the company in question intends to operate. I very much doubt Microsoft have decided how they are going to publish Bethesda games in the future yet, because they are not idiots or raging fanboys.
They could keep everything exclusive - in which case I'll buy an Xbox to play the games that I can't elsewhere. Or they could choose to maximise sales by also publishing to Ps5, in which case I'll just buy them on that.
Bottom line, anyone claiming that one thing or another will definitely happen is playing childish console war games, and need to give their heads a wobble.