People in general cannot really take constructive criticism. They go more based on feeling than anything else, along with their arrogance.
Everyone sees things as their way is right, without really questioning it (e.g. adopting social norms because of the reason of respect, without taking into account the consequences of that action).
I mostly agree with this, but then questions come up, such as what that proper advice is.
Some people will say that proper advice comes from those with experience or are in a position that makes them qualified to have a say, but sometimes, that advice is just plain bad, or they obviously have not done as much thinking or research as people think they do.
Plus, things are not exactly either 100% or 0% in possibilities.
Still, I do think you make a good point here.