I think it's because you have to pay money to access the cell network; You need an identety to clear billing with. Until we have enough spectrum for WiFi to have longer ranges you will never be able to use a portable device with internet access like cell phones have without being tracked. The extra data exfiltrated from our devices is often only a little more precise than what the carriers in many places are already selling.

I don't accept it on my phone either.

My Oneplus runs Lineage, and I explicitly omitted Google services.

I had previously run the MicroG rewrap of Lineage, but the maintainer dropped maintenance for six months, so I found ways to do without the GMS emulation.

Alas, your cell carrier can and probably is still tracking everywhere you go, as well as who you call / text / calls you / texts you, and sniffing your packets unless you VPN

I also use microG on my phone.