Independent publishers don't need to make such statements, Microsoft are being pressed for comment by media due the action of multiple market regulators. Independent publishers are generally looking for the greatest engagement and return, however Microsoft's motivations are different.
Why would it make "zero business sense" to keep Call of Duty off PlayStation, but it seemingly does make business sense to keep Starfield and Elder Scrolls VI off PlayStation? What is the "business sense" exactly? If Microsoft are chasing sales revenue then not releasing titles on a big platform makes no business sense.
Let's not be naive, Microsoft are spending tens of billions of dollars (almost $100bn at this point) on acquisitions so anybody who thinks they aren't willing to lose a few hundred hundred million dollars in lost revenue needs to replace their calculator.
Starfield is a new IP and elder scrolls is years away from release could be half a decade away. COD is still being released. Why would any company commit to releasing titles on a platform ? That negates any negotiation power they would have.
This is a very dangerous game for sony to play. I am sure going forward MS will push for every company that Sony purchases that has any 3rd party presence to not be approved