I have PC Game Pass and I get to "upgrade" to Premium when starting my PC... Why ?

I get it that Microsoft fucked quite a lot and needs to please its investors, but why does it have to throw down my throat the Game Pass Premium (which is actually less expensive than PC) when I already pay for a product? Come on, they could at least have the decency not to show me ads for a product I'm already paying for. Worst of it, it's more expensive!

Are they trying to remove the PC Game Pass option slowly and subtly?

Why would I change for those offers? There's 1/3 fewer games, stuff for the console I don't have, nor even care about, and the only upside is maybe (and a very big maaaaaybe) the streaming stuff.

And I'm not even talking about Ultimate, which is a rip-off for occasional use.