Even if I'm an "employee" in my mind I'm the owner of a one-man company that sells IAM/development services. Sometimes I have to dump one customer to service another that's going to pay me more money or let me work fewer hours. Work ethic and my personal reputation matters to me, but I don't care one whit if my employer goes belly up.
I am similar, having been a contractor for about a third of my working life. And even when I was permanent I rarely lasted longer than 2 years with a company, due to mergers and redundancies and bad management.
I'm currently in a perm role, been here nearly 3 years and quite happy to stay for a bit longer. I've been to a couple of interviews in that time that headhunters put in front of me, but I'm not actively looking. I like my current place, but I'm not married to it.
Be an asset to your family.
If you're lucky, you can go somewhere new where you know a couple people. And then you can bring others with you to form a group you trust. And build it over time.
There is also the potential that if the new place is paying you more than they are others on your new team (that have been there for a while), they will expect a lot more from you than what may even be practical. I've experienced both of these in the past. At this point I make well at the upper end for my job specification (although I end up wearing quite a few more hats), and although I can get a 10 - 15% bump that isn't worth as much in my current tax bracket.
Old tribal knowledge is as important as new perspective.
The most standard analysis would tell you that this will cause whatever work they're doing to be done better.
But that's only beneficial if that's the most valuable thing for them to be doing. Having worthless work done well is not obviously better than having valuable work done poorly.