I have a buddy who's 66 years old. He owned a large landscaping company in San Diego. When he got out of the Navy in 1981 he went back to Michigan to work at the nursery owned by his parents. He went to night school (there were no online course back then) to learn about... whatever the Hell it is landscapers need to learn about.
He moved back to San Diego and started his business with a Ford Ranger pick-up that had a lawnmower in the bed. His business grew expoentiallyto the point where he had the landscaping contracts for every Denny's restaurant in San Diego County and several hotels along the waterfront. What started out as a one-man show ended up employing over 60 people.
He sold that business and retired a little over two years ago.
Jimmy never married, although he's been close twice. He's got no kids, but is the best uncle possible to his nieces and nephews. He's generous to a fault with his family and friends. He's a self-made millionaire who lives life on his terms. He was given nothing growing up, and has worked hard for everything he has.
I don't see how someone could look at him and conclude that he's less of a man than someone else just because he never had kids...