That's not true. My younger brother watched all kind of titles including romance. A few years ago, he recommended me Shining Inheritance, W: Two Worlds and Reply 1988 and I watched them all. I was trying to make him watch some green flag romance drama, but he's doubting my preference for romance drama, but accepting non-romance recommendation from me. My friend's boyfriend and my colleague's husband watched vertical dramas which were recommended by their friends, mostly CEO romance. And my other colleague watched whatever his wife watched on netflix, but mostly romance since they sometimes fell asleep while watching the drama.
I'm a female and yes, I prefer strong FL who will grow together with her ML, leveling up and helping each other to thrive. And I prefer green flag ML, preferably someone outgoing and naturally cute.
For drama with cheating MLs, seems like the target are married women who stays/works at home? What time did they aired? If it's past 10 p.m. then they also want to warn the men not to cheat since all the cheaters will end up with nothing. Trust me, most men won't watch that kind of cheating husband drama voluntarily.
You can filtering out all the red flag sign, I'm finding these titles:
https://kisskh.at/search?adv=titles&ty=68&fm=7&ge=19&th=-257,-271,-795,-1045,-1559,-1715,-7397,-15263,-15265,-15989,-18081,-18083,-18113,-18115,-21037,-21041,-29370,-285&st=3&so=newest&or=asc&page=1
Seems like it's pretty accurate.
Or you could search lists made by mdl fellow members; something with title like 'green flag ML,' 'fluffy romance,' or 'sweet romance.'