This is a fair point. Taking it further, I also think it may just be that people with kids find "kid talk" to be a good default, safe topic of conversation with

This is a fair point. Taking it further, I also think it may just be that people with kids find "kid talk" to be a good default, safe topic of conversation with other people who have kids, so 50% or more of cases it actually makes them more interesting to those other kid-having people they can bond and empathize with. Whereas I, who am not interested in that stuff, end up mentally putting them all into a single "boring" bucket, while the guy who can't stop talking about his 24-pack of Soylent gets his own separate "boring" bucket.