This isn't about Android. Google's never going to kill Android because of the data they harvest from the billion devices out there. It's about Pixel 8/8 Pro.I think we can trust Google with this. Google and Samsung are the only OEMs consistent with their update policy. We cannot compare weak products like Stadia, Google Domains, etc with strong products like Android. It's not only drive them good revenues but also lock people into their ecosystem.
7 years update policy has never been replicated in the smartphone world. Even Apple provides OS updates up to 5-6 years. So, when Samsung came with a 4-year update plan, it was nothing special.
Something that has never been done yet - you'd least expect Google to pull that off. Hence, the massive skepticism.
So, when people are asking others to base their purchase decisions (which would be more pain in the butt once the 8/8 Pro reviews go live) based on a promise that is unheard of, it is practically snake oil at this point.