Drunk angry people aren't trying to harm you, and the ones that are generally aren't very capable due to being so drunk. It takes a lot of liquid courage to try and physically harm a bouncer. Not to mention the other people who have already mentioned this is a false appeal to authority to begin with, considering a few of the people posting here have bounced before, and have trained in some of the martial arts you are defending (specifically aikido).
Your defense of these arts isn't unique, nor is your experience of them. You are defending them with the same tired arguments that everyone uses when facing the cold reality that fighting isn't what it looks like in the movies and martial arts demonstrations, and that they are not training in something proven to work.