Yes. Isolation can be very damaging, and he seems to be aware of this. And for some people, sometimes, it really can be something that 'just happens' as relationships wax and wane, and not a conscious choice.
I am willing to 'out' myself as a human being who has struggled with serious mental illness my whole life, if there's a chance it could help this person. I have also had a long and prosperous career, including 5 years as a senior engineer and lead at Microsoft. These two things are very nearly orthogonal. I.e. my medical history has very little to do with my employment history.
But being compassionate does not require you to analyze this person's merits. The only thing to 'analyze' is that he begged you for help.
Also, please remember the hackers, family, and friends we have lost to suicide. People say "I wish we'd known. Maybe we could have helped." Well, you know; and there is a chance you could help.