If you love your coworkers, but hate your company's mission, should you stay or leave?
A society of constant, unthinking defectors, on the other hand, is unsustainable.
Isn't this also on you to maintain those relationships if they're people you care about? And on the same note, if you care about those people you can find ways to keep in touch, like starting a regular group activity.
Not many people are willing to put the effort in, in my experience. YMMV. I wish others more favorable outcomes.