What he forgot to mention was point 3a: "The solution, when you have kids, for dealing with friends who have no kids, is to kick their asses out of your friends network". It's closely related to point 3b: "The solution, when you're married, for dealing with friends who stay perpetually single, is to kick their asses out of your friends network".
Note, I'm not promoting this behavior, I'm just pointing out, from observation, that this is how people behave.
My experience, as someone who has no kids and is unlikely to have any, is that the only way to socialize is to move into a big city where there's a bunch of other ~35-45+yo people with no kids. Otherwise, you're going to be a very lonely person, because you simply will not fit into any other social group.
2. I oppose sex outside of marriage.
3. I do believe in some concept of a God (not necessarily Christian).
4. I oppose most "social justice" movements.
So, yeah I think I'm fairly conservative. I think 2 and 4 are what get the most flak in the LGBT community, especially 4 since all I support is non-discrimination laws like ENDA and anything beyond that is redundant. For example, I think badgering someone like Brendan Eich for being a devout Mormon and putting some of his private funds into a pro-Prop-8 PAC is stupid. Basically, all social justice stuff and "call-outs" are pointless when the real issue is how the State and corporate actors are allowed to behave under the law. I don't care if Eich thinks I'm going to Hell. All I care about is will he conform to the law when it doesn't favor him in discrimination? Beyond that, I don't care as to his personal values. So, I get lots of static for that particular view point.
I never understood this mindset. From a sheer work perspective, it's easier for ten people in an established group to make a small effort to the new person than it is for that new person to make the same (or even less) effort toward all ten. And from a psychological perspective, they're already in an unfamiliar environment and likely without any friends or family. It's much more humane for the established folks to reach out to the new people.
1. You're going to be working and single/married but still have plenty of time to spend after hours and on weekends with friends. The crux comes from income disparities that might prevent some friends from spending money on activities that others are willing to do.
2. As soon as kids happen, the group dynamics shift. The parents are often times going to be exhausted for a few years (especially if both are working), going out requires hiring a babysitter, inviting people over involves working around the kids or trying to avoid waking them. We host our friends all the time just because it's easier, but it's very different. Overtime this shift in dynamics becomes a big deal.
3. The solution for getting together with friends when you have small kids is other people with kids the same age who can play together. This causes another significant shift in the dynamic as you start to create new friends with parents from your neighborhood, school, church, scouts, etc. If you're in an new area and many people in these groups already know each other, then you're going to be responsible for making the effort to get to know them.