The biggest reality check in my life was working at an engineering firm with a bunch of near retirement baby boomers with no children. They all came across ass listless, unhappy, and living a life with no greater purpose. It was unquestionably one of the ugliest things I have ever seen. As you get older and friends drift and pass away family is one of the most important things in life.
I know anti-natalism is hip right now but it makes me sad to think of all the millennials and gen-z who will reach their 50s and 60s when it is too late and be stuck in a life without purpose.