I didn't say it can't not happen all I'm saying is that of course they're going to say your life is in danger (when it probably isn't) because that's what pulls people to learn self defense. Reality is that most people end up on the ground in a sweaty, tired struggle trying to one up the other before people come and pull them apart. Rarely are you going to get someone throwing straight punches to the dome and the other guy just taking it. It does happen but not at enough frequency to really be scared of it imo