OTOH if you have location tracking on for Google Maps it will know if you're driving and will alert you of problems a couple of kms down the road (accidents, construction, etc). This has been helpful in a number of occasions while not using directions.
Well I'm completely fine with them offering that, there are lots of things that location tracking is useful for. I just want them to make things optionally available with the permissions granted being proportional to the task. If you want traffic warnings then that's great, but you still shouldn't need it turned on to store your home address.
My problems with Android are largely around all the things you can't do without turning on web and location tracking. The most egregious of these is probably the aparant inability to set your home address in the google map app. There is no reason it can't store this as some kind of favourite. It is ridiculous, and indicative of an approach designed to maximise the amount of information you give up to them.