i dont think that is true at all. what i have found is that im not very sensitive to criticism or attacks on an emotional level, in fact, those things rarely even scratch me.
what really is the problem for me is the thoughts that come up when something like this happens. someone laughs about me? i must be a looser, must be acting/looking silly, whatever. someone gives me a bad look? there must be something wrong with me. does a bad look hurt? not really. thinking "damn why does this person not react favorably?" does.
More broadly, my primary concern was (and still tends to be) what this incident might "mean" about me and who i am, or what other people might think about me as a result of this incident, and not so much the incident itself.
i would often think about these things for days and even weeks, and judge my whole life and person on such incidents. i would allow thoughts like this to completely ruin me and my self image. that process might be what causes you to think that youre sensitive, when youre in fact not that easily hurt at all - when you lived a life of sa, you probably are emotionally desensitised to many forms of negative external events.
why am i telling you this? because i feel that thinking that youre just (too) sensitive is a trap. i makes you believe that youre just not fit for this world, when you are probably as fit as or more fit than many others, you just use your mind against yourself unwillingly.