Lol it's because many of those dramas listed are meant for entertainment without too much "substance", therefore they exaggerate and make the characters stupid/naiive/inexperienced. There's a taiwanese drama called Silence...it's quite different, I think you'd enjoy it. Oh, and also Meteor Garden...the mother of all taiwanese dramas lol. She's not really a "tomboy" though she has some qualities, she's just very independent and righteous/fierce.