Sufficiently detailed telemetry is indistinguishable from surveillance because even if the goal isn't to target you right now, they will still have the secondary option of going back and inspecting all that data you sent them if they ever are interested in you. Another secondary use of telemetry is selling it to someone else to squeeze out a bit more money. There's no downside to doing this, so any business that collects a lot of varied telemetry and likes making money might as well do it. And once the data is in the hands of adtech businesses, it becomes a whole lot more like tracking you personally than just collecting some data for development. In Google's case, you don't even need to hand it over to anyone else, everything stays in-house.

I heavily doubt that.