Exactly, what's the threat model? If I were a terrorist with a ground-to-air missile, would it matter to me whether I blew up a specific plane or just the first

Exactly, what's the threat model? If I were a terrorist with a ground-to-air missile, would it matter to me whether I blew up a specific plane or just the first Jumbo-class plane of $country's airline to take off? Would it matter to society at large whether a plane had been randomly or specifically targeted?