Getting adsep'd is a far cry from "getting promoted" to anything.
I don't think he was saying it is. Just that some of the younger, dumber white-hats think it is. "Dude, I'm so sick of this Navy bullshit. My recruiter told me I was gonna be a SEAL, not a fucking mess-crank! I'm gonna take a shit on the Skipper's desk and they'll kick me out with an ADSEP so I can get out of my contract early. It's not a Dishonorable, no one outside the Navy cares about an OTH anyway. Then I'm straight-up going to go get a recording contract...you know I totally owned everybody's ass at berthing freestyle night, right? That or become an Ultimate Fighter...I haven't decided yet."