Most people are alone because they don't prioritize the families they already have (parents, siblings, grandparents, cousins, etc). They graduate high school, attend college in another state, move to another city far away for work, etc. Those are choices and they carry consequences. It's not good by default to follow your dreams if the only way to follow your dreams is to be alone and isolated in a strange place. Career is only a portion of our lives and it is far from the best way to draw meaning and purpose for ourselves. It's much better to draw meaning from something that is more permanent and guaranteed, like your identity and your home, not the job you just so happen to be doing at that moment.
There are exceptions to every rule, but it should be understood that when people graduate from high school, they should pick a trade school or university that is close by, not far away. When they choose a focus/major, they should ask what jobs exist in their area, not what kinds of jobs exist in the whole world. When they graduate college, they should be looking for work near their home, not on the other side of the country. Work and career is unreliable and people fail a lot. It's not the thing you should rely on to make you happy or satisfied.
It's better to have less of a career and more of a family than less of a family and more of a career. Your career accomplishments are not as important or valuable as they seem. If you didn't do them, someone else very probably would, and you will also very probably be forgotten quickly after you retire or quit or die. But more humane pursuits like family, home, faith, and community will always be there if you invest in them.