Yeah. Of course, why bother packing a car with about a tonne of TNT and driving it in relative obscurity to cause an enormous amount of damage and kill dozens of people when you can, at great risk of getting caught, steal a light plane, put a couple of hundred kilos of TNT in it at the most and then fly in a highly conspicuous manner to your target causing a litlte bit of damage maybe killing one or two people.
Makes perfect sense to me.