I am not entirely sure that diagnosis is always a good thing.
This is a spectrum of disorders and I think many people are not diagnosed.
If you draw a line and say that if you are on one side, then you are autistic, and may get some help, but if you are on the other, then you are not autistic and are treated as neurotypical, then many people will have issues which deserve consideration, and get none.
If people present with problems in medical, work or education situations, then they need tailored help for their particular issues?
We perhaps need a different attitude here. In stead of labelling some people normal and some disabled, lets just say people have mental, physical, neurological problems, to a greater or lesser extent and focus on the person, rather than saying this person has this label and pick up a standardised list of instructions for how to deal with this category of people. And worse still, this person has no labels, so they can do all the things on another list of instructions.