Assume three factors play into this:
- some kids are easier going than others.
- most people have less than three kids
- some adults have higher tolerance for kid chaos and lousy trips.
We didn’t do a ton of traveling when DS was younger, but he was an only, and he was extremely flexible (eg compared to your kids, life went on without a nap, he would never have flipped out in a restaurant, he had the endurance of a champ etc). But DH and I have limited tolerance for stress, so the whole idea of having any inconvenience at all never seemed to appeal to us. I mean, the point of vacationing is to relax, right? And DS has fairly severe adhd, so even though he was super flexible, he was crazy high energy which meant we had to be high energy too.
In light of all that, we visited my parents beach home a lot when he was young, and went to Europe for a month once, and had done family trips here and there, and all were pretty easy but we didn’t have any interest in doing anything more chaotic than that.