Of course you ignore the fact that airplanes have access to places a car can't go - the tanks in an oil farm, the dome of a capitol building, an office tower, the catalytic towers in a refinery, the stadium of a county fair. Loaded with appropriate explosive material, the damage it could do could make a car bomb pale in comparison. Escorting F-16's are at a serious disadvantage. The Cessna can stay in the air at speeds that the F-16's lose control. A Cessna flying at 1500' can drop and crash a target before the F-16's can circle to make a pass - much less radio for final clearance to engage!
Your pre-Wright-Brothers mentality is curious.
Yeah ... and you could build mortars from materials available at your local hardware store and get the same effect with better mobility and fewer chances of being spotted.
As this example shows, a small airplane is a wretchedly poor means of delivering a telling blow. It was spotted and tracked. Even if you flew one into a spot like that ... in a big-picture sense, so what? It's local damage only. Hardly a country-shaking event.
Drop and crash a target? Have you ever flown a 172? LOL
Your pre-Wright-Brothers mentality is curious.
Would you care to match your CV with mine when it comes to aviation? Two days ago I rode a wave to 34,000'.
Of course, if someone were intent on using a Cessna for nefarious purposes, I doubt they would steal one and fly off w/out a flight plan. It would appear all legal and on the up and up, right up until the time they deviate, and then it would be too late.