True, once you cut it you can never go back. I'm cut and would prefer that I hadn't been snipped but it wasn't my call. I suspect strongly that the head does get less sensitve by being unprotected. If possible, solve the problem without losing that protective sheath.
OTOH, if you do cut it off, the other half of your beard might finally grow in.
OTOH, if you do cut it off, the other half of your beard might finally grow in.