First, I don't believe there is such a thing as "selling out". This comes from the completely BS notion that only "art" matters, and it's only art if you write it solely for yourself, and out of some mushy feeling you have in your heart.
Writing is writing, and anything anyone wants to write, for any reason they want to write it, is perfectly legitimate. I really see this as no different than ghosting a book.
The romance market is huge, and a higher percentage of novels written for it will be accepted, simply because of size. But anyone who thinks writing a romance is easy, that it takes any less talent or skill, is simply nuts. The romance genre has some incredibly good writers in it. Of the two most memorable descriptive scenes I've read in modern novels, one was from a romance novel by Marsha Canham. I read that scene a long, long time ago, but it's as fresh in my mind now as it was when I first read it. I still see it in exact detail, all these years later. That's incredibly rare.
If you can't write well enough to sell in another genre, you probably can't write well enough to sell a romance novel, either. But if you can write well enough, and it's something you want to try, there's no reason on earth why you shouldn't. This applies to any genre.
But don't think you're getting off easy, or that your writing can have one bit less quality.
I don't think the popularity of romance novels is a trend, and writing for the romance genre is not following a trend. Though I'm not completely against following trends. If you can write well enough, if you can write fast enough, and if the trend lasts long enough, you can do remarkably well by following a trend. Coattail books can sell almost as big as the book that started teh trend, if they reach the publisher fast enough.
I learned a lone time ago that I'm very good at targeting a specific audience, and even a specific editor, and it came as quite a revelation because it works so well. It profitable, and, as important, it's fun.
It comes down to write whatever you want to write. Targeting and switching genres does not mean you can't still write a book that you want to write. or that you can't tell the story you want to tell. And romance novels can have just as much "meaning" as any other kind of novel.
Just have fun.