To suggest that it is impossible for a given individual is different from suggesting that it is difficult which is different still from suggesting that it is suggested.
I have personally benefitted massively from deconstructing the walls that my parents and peers suggested I build as a child. It was work to do, and is work yet to be done, but I value it.
I am no longer angry in traffic when "the jackass can't see I'm late" or whatever other silliness. I no longer dread the stench and noise of public transportation. Both are natural. Just the way humans are. Being perturbed by it is a choice that I've decided I could do without.
Minus some socio-behavioral-mental deviation from the norm, and even then considering advances that can be made with therapy...I just don't see it. Why should I be bothered by people on the train when I know that it is possible to just...not?