yes these things get you hooked pretty easily. you can use them to plan routes meticulously and then ride them without having to consult a map while on the way. but still if you make a decision to deviate because you see something interesting, you can do that as well and it will just lead you back to your original route eventually.
also you can add your home location and with a big button in the menu, tap it at any time, wherever you are, and it will get you on the quickest way home. that gives a lot of peace of mind and i can see how that would help an autistic person.