You don’t really prefer a lower resolution, you just work within the limitations you have.
Also, I don’t notice much of a difference between 1080p and 720p
Either your display is really shitty or you need (better) glasses. This isn’t like the difference between 60 and 144hz where its barely visible for untrained eyes.
They get that same location data with or without maps. As long as you are using stock android, Google knows exactly where you’ve been even if you enable airplane mode. They get your position with WiFi networks and other phones around you and store that data with timestamps. Maps doesn’t give them any extra data, it simply binds you into their ecosystem.