is it impossible to use it for hunting
or using it to protect yourself
He didn't say it's impossible, he said it's unnecessary. Problaby even impractical because of the size and cost
A single shot with a 9mm is plenty of power to stop an intruder. Even if they're wearing body armor, it'll still hurt. Even if you
completely miss, the thought of "OH stuff THIS GUY HAS A GUN AND IS SHOOTING ME" is enough to get the average intruder the forget out of your house.