Because the Coast Guard wanted real men? 
BTW , What is this Sanity of which you speak of? I'm afraid I lost mine the minute I volunteered to jump out of helicopters attached to a 120 feet of rope.
Nah, I'm too short for the Coast Guard. You know how it goes, they only want guys over 6' so if the ship sinks they can all walk to shore.
My house burned down with me in it when I was 12. So I join the one service that's all geeked out about everyone knowing how to (and actually doing it) fighting fires? Yes, I've been in several--GD shipyard workers.
Hey, I used to be on ships DESIGNED to sink. No rope. No life vests. No scuba tank. No shit.
Wanna talk man stories? You find out real fast who the real men are when you're going through 800 feet with a 20-degree down angle, can't reverse, and the Chief of the Watch can't get the trim pump started. Pucker Factor 10,000.