I said "Apple collects data" as a shorthand for "Apple's software collects data and stores it on your phone" because the distinction you're making seems to be meaningless to most people. I can see your point though.

Still, I don't see why this is better than an optional, third party application for this data. I also think that people should be upset at their phone keeping this data without their knowledge. You say it could be useful, but useful to whom? Advertisers, stalkers, "The Government"? I can't see how this useful to most users at all.

computers log data, A phone is a computer.

I think most people view their phone somewhat more intimately than their computer. Notice the uproar any time privacy issues like these are raised about a phone. Furthermore, tracking someone's location is just about the creepiest thing you could do for most people. It's just ripe for abuse, and as I stated earlier, I can't see much in the way of positive use.