Because most men can't admit they need purpose or what's lacking. Therapy isn't the cliché of bawling into your therapist's shoulders (although it can be that). It's often them telling and pointing out to you what others, including friends, won't. And an experienced professional can be excellent at bringing that out. It's also not for everybody, but often the most hostile people to it are the ones who'd benefit the most.

From what I've gathered in his post, this guy needs to be told he pushes people away and has trouble forming non-professional relationships (platonic and romantic) as well as as a deep seated desire to be liked, which he can't get out of a professional setting that he was at the top of. But it could also be much more deep than that.

Of course, finding the right therapist is like finding the right mechanical keyboard. You'll go through tons you hate before you find the right one.