In fact lots are claiming the opposite since this leak came out and they started looking at the numbers and taking directly to devs involved.

Then please link that instead of their estimates, because if they were lying, publishers calling out bad math is exactly what I'd expect to happen. What I see on this list though are a bunch of costs that can be spread out over several years, not paid out all at the same time. Jedi Survivor, Suicide Squad, and Mortal Kombat account for $800M of this list, and none of them came to Game Pass, meaning Microsoft did not opt to spend that money.

Games leave gamepass since when it comes to renewal they don’t want to since streaming cannablizes sales and leads to lower revenue (already said this) so it’s not Microsoft deciding it’s not profitable, it’s the game wanting control back.

You are misplacing cause and effect. It's more expensive for Microsoft to get someone else's game on Game Pass right at launch than it is after launch, because if it's a game people are already excited for, it will eat sales, as opposed to something like Descenders where most people never even heard of it, so it would serve as a form of marketing. In that case, Microsoft and the other company are essentially making a bet with regards to how much the game would make if it's not on Game Pass, and Microsoft pays them a guaranteed sum up front, which reduces risk but also reduces reward. When a game leaves Game Pass, it's not because they saw their sales tanking and wanted to "take back control". It's that Microsoft isn't offering them enough to make up for the sales they'd expect to otherwise make for the next leasing period. Microsoft doesn't offer them as much for the next period, because they don't expect that keeping that game on the service keeps more people subscribed.

If you can produce that link that demonstrates what you're claiming, I'll read it, but otherwise, this sure looks like you'd rather believe in some boogeyman conspiracy theory than a simple truth.