That's fine for you. Other people have different priorities in their lives. And elevating the sanctity these abstract entities known as "institutions" to the point where they feel miserable, trapped, and unfulfilled do not count particularly high among them.
If one is "sexually incompatible" with his/her spouse, they should talk about it, recognize the issues, make compromises, and move forward.
That's fine for you, if those are your priorities. But what's fine for you isn't necessarily fine for other people.
They should also recognize that while sex is meaningful and important, it can't be a deal-breaker for a marriage ...
Again, maybe not a deal-breaker for you. But for other people... I think you see what I'm getting at here.