The question is "Who are _they_ and will the data be used to annoy me?".
Targeted advertising certainly just annoys me.
But what is worrying is that it seems quite difficult to find out what an individual phone is capable of doing and actually does.
For example, why does one of my phones seem to have a 2d accelerometer and the other a 3D one? How do I find out if the 2D one is actually a broken 3D one? Another example, Before buying some vehicle diagnostic software for use on a smartphone, I need to know exactly what version of Bluetooth each phone is using. I've not been able to do this. There may be an app that does dig out the info, but I haven't found it.
Before the launcher crashed, I'd been using the Termux terminal emulator to attempt communication with OBD2 vehicle stuff. I wonder if that could be used to run some Linux diagnostics on the phone internals (not that I know anything about Linux diagnostics!)