Yes that is true. It is completely objective as to who you like or dislike as actors. She does a lot of stuff that is very samey, so if you dislike her in one thing, chances are you are just going to dislike her in a lot of a the other things she does. As you mentioned Emilia Clarke, she has done a greater range of stuff, and she has had a bit of a ropey career post GoT but I like her even though she is not the worlds best actress. She plays characters differently, they come across to me as having depth and nuance. Even though she has not been as successful as LJ, I would watch her happily in anything, whereas I had to fast forward swathes of Pursuit of Love because of her silly immature spoilt posh girl character, but that is the character she plays a lot, so every time I see her, it annoys me and ruins whatever it is Im watching! I haven't seen her on stage because I don't want to spend £50 watching a play that she's in, so chances are I wont ever see her on stage
I'm sure she's crying all the way to the bank that I don't rate her as an actress though! We like different things and there must be a lot of people who love her for her to have been so successful.