> International travel and fine dining is absolutely not comparable to having kids in terms of the returns you get on these activities.
The returns are guaranteed, whereas a child can end up having negative returns at an almost endless scale. The potential downsides to having a child are endless, the upside is limited and finite.
Also w/o children retiring early is doable for the financially responsible, whereas having even a single child makes that difficult.
Being financially independent at 40 or so allows for a lot of options for self fulfillment. An almost endless array of meaningful causes around the world are in dire need of help.
The tl;dr is that for a lot of people the choice comes down to "travel the world and have sex on beaches while eating fine food" or "unknown baby that might bring joy or potentially ruin your life."
Is it any wonder rational people are choosing the path that allows them to travel, eat well, be financially stable, and find meaningful hobbies and activities?
Again, I believe what it comes down to now is that people have a choice. It isn't "get married -> have kids" but rather "find partner, figure out what to do next".
Heck marriage rates are also plummeting (which IMHO is bad news for social stability).
The lack of social support certainly makes the choice of having kids harder, but my #1 ask isn't government funded daycare, it would be a world where having a large familial support structure is the norm.
Honestly the hardest part of having a kid is that without family nearby, there is no down time.
Government programs can't help that capitalism spread families to the winds.