It's pretty useful for internet alpha male and reckless goon points.
People knowing about it doesn't help it just means they start to dislike you because they pick up on your 'antics'. I generally don't care about anyone really, I just told some people once hoping to be understood and known by some one.. Didn't work out how I fanaticised just caused me problems. I don't do self medication anymore it got annoying. But I found someone that I pretty much love / own and she's mine and I want to keep her forever but I think she believes everything I say which is bad because I lie a lot to fill hollow space and when I'm bored and I can't help it but she can't tell that it's not true when I say I want to die, I don't I'm just really bored.
Useful? Probably not all that much for the person that has it, necessarily. It might help those that deal with them to know. Don't know about insurance. There are lots of medications, but the best are self-medicated and home-grown. Yeah, it's annoying sometimes. What's even more annoying are people overly spuriously curious about it.
Dex, you've never even been diagnosed with AsPD and would never get diagnosed with it, so I doubt you know whether it's useful or not.
As someone who has it, I can tell the OP that it's not useful getting diagnosed because there is no benefit in having the label.
It's a useless label. Same as the psychopath label. It's useless as well.