Garages are far too versatile to be used for just storing a vehicle. I go around my neighborhood and see workshops, weight rooms, an "outdoor" kitchen, bar with pool table, hair studio, and more.
Seriously, if people were really supposed to park in them every house would have a four or five car garage with each bay being 12x24 or so, so you can actually get in and out of the vehicles. Figure two cars, plus bikes and sporting goods, plus some workshop space and the second fridge.
But, we don't have basements down here in the south (and especially not near the coast) so garages fill the role(s) that basements probably do in other places.