He worked for years as a licensed therapist counseling individuals and couples. If you are looking for a source of authority, he's better than nothing, if not as good as a randomized control trial.
That's putting aside any marketing reasons this person has to appear on a podcast and have "the answer" to male loneliness.
for me that connects to believing that the purpose of humanity as a whole is to contribute to an ever advancing civilization. that means even if one particular purpose that kept me going disappears, i can find others because there is plenty of help the world needs, and finding a new purpose is much easier if the overall purpose is: do something useful for the world and not: you are supposed to provide for your family. if you can't do that, you are useless.