the dsm is just a guide, before you get labelled, you are investigated a lot more then just a check list
on the other hand i dont see labels as a good way to 'cure' people. they can be used in research, but not in cure. because it puts you in a box, while each person has some uniqueness about the way they should be helped.
and when you are labelled you are also cured for stuff that may not matter... only your problems should be helped. a label has many traits, some of which you may not have at all. labels are useless in healthcare, only traits are useful. as such labels can only be used as a guide, not as a definition of a personality.