Respectfully, can you have meaningful privacy with a (mainstream) smartphone? How? On a desktop you could tor everything I guess, but on an android/iOS device, everything down to the keyboard is compromised by design...

You're absolutely correct and that's not an excuse to compromise or abandon privacy universally.

I mean, it is though isn't it? If Google know where I am at all times because of my phone, and they have all my selfies, what privacy am I actually losing because they know what time I got home from my doorbell which took a picture of me? If the same phone is listening constantly to me incase I use voice commands, what privacy am I losing by having a nest do the same thing, but only when I'm home?