So very true!
It's extremely unfortunate that those who like to flaunt an "I don't care what people think" attitude are all too often just using it as an excuse or crutch to absolve themselves from personal responsivity.
No, you don't need any one else's approval, but ignoring other people's feelings, perspectives, and viewpoints doesn't make you any better either.
You shouldn't make any decisions strictly based off of anyone else. It's just information you can use to improve yourself. In your eyes, they may be almost entirely incorrect, however, there also may be just enough there that can lead you to something worthwhile.
Why would you willingly ignore that?
~
"Change your life. Change the world. One decision at a time."