I'm Spanish, and can only speak for myself. I began my cdrama journey because most national and western tv/streaming dramas are too explicit, dark and tragic for my taste. So in my quest to learn about other cultures one day I decided to also start searching for comedies or light-hearted dramas from other cultures. I fell in love with quite a few of the cdramas I've seen, and I've been following it ever since.
Other two very important reasons why I prefer all the cdramas I've watched over western shows are their very morally grounded characters and themes, and the way the cdramas I've watched depict the kind of love that I most associate with. This last bit is hard for me to explain; let's say that when I fall in love, the mental process would resemble one of the cdramas I've watched far, far more than a netflix show.
This is to say, not all of my country's dramas are dark and explicit. We do have some very pleasant shows. But I have always needed to live in a world of stories and cdramas do help immensely with that.
I should also say, I'm the only person I know who watches cdramas from my real life microcosms. I think probably most of the Spanish comments are probably from America, given that Spain (an entire country) has a population of 47m, and over 126m people live in Mexico (Spanish) and 214m in Brazil (Portuguese) alone.