[rdiddly]

It's a bigger hassle to the Cessna pilot than going about his business and flight plan, and a smaller hassle than his getting caught in the middle of a jet scramble or other military response perhaps.

Also, it's not necessarily entirely about the pilot's safety/inconvenience tradeoff. The Cessna IS a hassle, for anybody trying to scramble jets or launch an anti-missile interceptor or who-knows-what. The Cessna, on the ground, perhaps with its pilot quietly bitching about his ruined flight plan, is a smaller hassle.