A similar cunnendrum entered my thoughts only the other day penlid.
There was an charity request advert for children born deaf and blind. It was harping on about how lonely their life was etc.
If you lost your primary senses after being born, yes I agree it would be dreadful, but these children born like it are probably happy as a sandboy.
They would be born with the "pleasure principle" so when food, warmth, shelter, water and maybe even physical (and later in life sexual, arousal is given to them, they would be happy.
It is a concept I nor any psychologist can truly fathom, but I was not moved by the advert at all.
Being born blind and deaf can not be that bad.
Sorry to digress a little.