What’s up with orphans in Korean dramas?

I am new to this field, but have just noticed a curious thing. All of the Korean dramas I have been watching seemingly had or have developed plots, that feature orphans as main characters … o.O

I had no bias other than high viewership ratings, but that should not be the reason for such skewed results … maybe orphans just make for a good/dramatic plot … your theories are very welcome. 😉

My “random” sampe: