I should've been clearer: I didn't mean "have to" in the sense of "strictly technically necessary" but more along the lines of "if you want to use this function

I should've been clearer: I didn't mean "have to" in the sense of "strictly technically necessary" but more along the lines of "if you want to use this functionality, you'll have to help us out by collecting the data that'll make it work better for everyone". Whether or not the collected data really makes the positioning that much better, I don't know, but Apple apparently seems to think it does.