This is what lots of people forget.

Android is not a Linux desktop or server distro. It is not about you getting to put what you want on the hardware you bought for free.

Operating systems are hellaciously expensive to maintain and that only gets worse in markets with rapid hardware improvements, as the smartphone market was up until maybe the late 2010s. Google is not a charity. SV did not come into national prominence for making investors $0. There is no money in giving maybe one in one-hundred smartphone users (and that's being generous) a bunch of code, for free, so that they can put it on their gizmo and talk to their nerd friends at their hacker meetup.

When they pitched Android as "open", they meant that carriers and device makers could load it up with all of the revenue-enhancing bloat that they wanted. In return, Google got a device that would let them hoover up all of the data they could ever want in order to build better ad service profiles for those using the devices. That is, after all, their business.

For a while, this could coexist with us screwing around with a real-life tricorder. At some point, though, the free stuff turned into a revenue opportunity that had to be exploited. And so, it will be.