moving abroad actually requires a lot of consideration, starting from new adaptations, language barriers, capital to live abroad and so on.
actually i have a desire to go and settle temporarily in several countries but i don't want to move but i want to have a business that has branches in various countries.
if you are still not married, of course it might be easier to travel and try new things and try our luck abroad. but when you are married and have children it will not be easy.
I think there is some truth to the point you made, because after marriage, one's freedom to travel abroad will be very limited by their own family. Especially if a person already has children so he must also care for his own child even though he has a better goal by going abroad. But it certainly won't be easy for him unless someone is still not married and has big aspirations to have a business abroad and develop branches into his own country when his business is running more advanced.
Actually everyone's wish when they want to move abroad is to get more jobs and money than at home, but most people are always hampered by costs and also the language they need to make it easier for them to communicate with outsiders. I think that is what is the main obstacle for most people who have the desire to move from their country to another at this time, so there are many people who ultimately have to discourage it from moving to another place.