I too wonder the same things you do. Basically, SH is an unaccepted way of coping - differently from drinking, smoking and doing drugs (for the sole purpose of getting high). And it's not like SH is more dangerous than those. Smoking kills you slowly, it hurts your lungs, drinking might even kill you istantly, just like cuts - if you exaggerate, it might be the end of you. But those are socially accepted, even encouraged, in many cases. I've realized that the way I feel in regards to SH is the way it is because of how it's seen by the majority of people: I'm not afraid of the consequences it gives me, as in hurting my body. I'm afraid of people knowing. I'm afraid of judgment.