The average user isn't willing to pay more for their devices just to avoid the seamless sharing of their data with google. There's a reason people stopped buying desktop computers and are relying on mobile devices and cheap laptops for more: its cheaper and they don't care about the hidden "costs" of their data being shared.

In addition, sure, people could absolutely create local, non-cloud ways to accomplishing a lot of this. But who is footing that bill? Where's the value proposition to anyone who has the manpower