I see this as an opportunity to improve my writing and marketing skills for my own work, and I kinda wish more people started thinking the same way. Whether or not all of this romance/bl on tapas is actually good (good as in quality) is another thing -- they're still able to market themselves in a way that brings people back for more.
If all else, even if you don't like romance or think it's cheesy or whatever, it would help to look at what they do to bring in readers and find ways to apply that to your own work.
Moreover, genres can combine within stories. Even if you're not writing a romance story, you may include romance within the main story. Hence, if you don't know how to write romance, it helps to research the romance genre and see how other people did it and did it well (key word is well, my friends).
I write two romance stories now, but they're paranormal romances. And I have three short comics out now that don't deal with romance, but they have romantic elements in the background. Romance isn't the main thing, but it's there, and I do that based on consuming other romance stories I thought were good.
I might not read romance or be a big fan, but I still look at it to see what elements I can use for my own stories. As a result, even though I'm not writing romance for the other stories, a lot of my readers have gone to support them. Even better, a lot of my readers have gone on to read other cosmic horror and folk horror stories.
I say seize the chance -- doesn't mean you have to write a romance or a BL. But if you're standing around wondering "why is this popular and not this other thing", it helps to actually consume some of that popular media as research and figure it out as you go along. Find ways to twist those suggestions so that they fit your story and your purpose. And then the supply and demand won't be as saturated.