I’ve been doing that since day one... or close to it.
Problem is, I have very little confidence that just because I have location services turned off that they aren’t still tracking me.
Do I think that by clicking a button on my phone it protects me against being tracked? Maybe not. The OS in not open source, so no way to tell what it’s doing.
Should we still turn off tracking? Yes. No sense in making it easy for them. Plus, if there’s ever a class action suit, we have grounds to sue them.