^I didn't say she doesn't care, I said she most likely doesn't keep around social media reading every other comment about her, and that the decision about blocking comments most likely has little to do with her feelings being hurt. The comments are blocked on her personal youtube account too, and I bet she doesn't upload the pvs herself.
But she obviously does get bothered by how people perceive her, as does any other popstar, and people can often be really mean to her over the most stupid things.