To me, it is about choice. When you don't have the money you need, you must work. It isn't a choice to do so. And if your specific jobs becomes untenable for some reason, you have to soldier on anyway, at least until you can line up another job.
If work brings you fulfillment, great. Keep doing it. But that's where the "FI" part comes in, even if you don't RE. It allows you to pull the "R" card the moment work is no longer fulfilling, either temporarily until you find a new job or hobby that does fulfill you, or permanently.
I have doubts that Husband will ever truly want to be fully retired. My dad, who turned 72 yesterday, is still working (part time, consultant on retainer) and I'm not sure he'll ever give that up voluntarily. He likes it. He and my mom certainly don't need the money as they are in their 70s and still have positive cash flow. So it is all about the work for him. But the point is he can choose to do it. Or if he wanted to go to Europe for 4 months and the company wouldn't allow it, he could severe the relationship and be just fine. If they want him to work more hours or travel more and he doesn't want to (even for more pay), he doesn't have to.
DH and my goal is to be at a point where, when he retires from the military, we can be okay financially. It won't be the life we want, but it wouldn't be miserable and utterly bare bones, either. That will allow him, when looking for his next job/career, to take his time, to value the job and the company culture over the pay, to be selective about location, and to feel no pressure if it takes him a year to find something. He believes he will still want the intangibles he gets from work because he finds work fulfilling. But that doesn't mean it won't feel very different when we don't *need* the money, and that his experiences won't be different because he will be working purely by choice and for fulfillment, rather than our of necessity and for money.
If work satisfies you, keep doing it. But there are still plenty of reasons so get to a position where you don't need to work. What if you get injured or sick? What if work stops being fulfilling? What if you are laid off? What if you realize a previously undiscovered for gardening or stamp collecting or croquette and suddenly that's what you find to be fulfilling instead of work?