Also making your family, esp kids move every few years sucks really hard for them, never being able to build their circle of friends.

No, just that "it’s a wasted life".

>I relocated to live in 5 different cities in the same time span, met many different people, for me that counts

And for others having roots, and not just meeting different people like a tourist only to dispose and move on in a few years, but building deep relations with people, is what counts.

To be frank, it sounds like novelty seeking to avoid deeper commitments and more substantial development. Of course if one is young (say <= 30) it can also be fun.