Something I've noticed while talking to my older relatives outside of the US is that their social life often are the people that they meet in their (first) job in the location they ended up staying in. It feels straightforward that the people that you spend 8+ hours a day with are going to be the people that you feel like you know and can trust.
It seems like some odd modern/corporate idea that work is just for work. Imagine if we had the same mindset for school, and tried to make things "productive" by eliminating all breaks and the assumption that students should get to know each other during class/free time.
I think we need to accept the idea that work is really going to be much of your social life when you move, work friends are not your best buds, and only later on can you have a social life that doesn't deeply involve people at work.