Lives don't exist in vacuums. If I could uproot my close friends and family and we all moved to the same place then I would, but that's not possible. I'm sure it's the same for a lot of people
This was mostly in response to "You can also be a 10x engineer while drinking a martini in the balkans." and is likely a bit of an overreaction to the amount of "just move if you don't like it!" things I've seen. Mobility is a luxury
Uprooting family and friends has little to do with taking a month off, but if things don't fall right then one runs the risk of spending their month off mostly by themselves which may or may not be attractive. I've known single teachers complain about this that they have June-August off but no one to spend it with because most of their friends are not teachers