Talking about change or asking people to change can be a sensitive issue. Everyone behaves the way they do for a reason, usually based on their life experiences or their values (with a few notable exceptions). I can’t speak for everyone (though experience tells me humans are more alike than we think) but I know if someone directly asks me to change in some way I feel like a part of myself is being rejected. I’m sure that’s not the intention of the other person, but that’s how it can feel.
Being open to change requires vision. Vision to see possible alternatives. I have to be humble enough to believe there is a better way. I have to realize that the suggestion of change (even if ill-advised) in not a rejection of who I am, but a belief in my potential. At least that’s how I should try to see it. That said no matter how receptive to feedback I get, there’s always that little voice whispering the worst. The goal isn’t to get that voice to shut up, its being able to tell the voice why it’s wrong.