An intersex child who grows up at odds with his physical sex would be able to fit in with society within the range of accepted adult norms and go through ops etc if they so wished and live a normal life.
I have no idea how id react to an intersex person i met for dating.
you would then carry the risk that the child grows up and identifys themself with the opposite sex to what was forced on them by surgery.
Sexual identify comes from many factors including genetics, hormones, upbringing etc.
These days as adults people in our society regularly choose to identify with another sex and some go as far as having the ops to do it.
In adolescence such a child would be better placed to make decisions as hormones and personal preferences would kick in more, but i would imagine the bullying would be horrendous if things are not very carefully managed.
You could probably argue that having one sex identity from birth would solve most of those issues.
From the point of view of children, you've got until the hormones start kicking in for puberty before you have to make permanent decisions, so you've got time to ask them their opinion as to what they want from their life.. Where things go in more complex cases is hard to say.
A child who lives his early years up to adolescence with no sex identity could well suffer a lot of confusion and isolation, not to mention bullying.