schizophrenics often can't tell easily by themselves that they are schizophrenics, if a blind person comments about hearing things others might simply write it off as their (the blind one's) acute and great sense of hearing that the blind developed through necessity that they (others non blind) don't have and thus can't hear

That implies that schizophrenic people ARE stupid for believing the things that they experience.

Which is much more offensive and disrespectful than what I said.