It is I think.
Two of his other series are set in contemporary earth and he manages it. One is a pure sports romance ( Chasing Dreams - about a group of olympics hopefuls), the other is a Indiana Jones like story (Relic Hunter).
I’d imagine a ship romance would make it not that hard. And I imagine strict chain of command would add something to power issues. As I recall one talking point is having a mature aged woman in it. You don’t tend to see mature aged women in men’s romance, well unless they are ageless.