I've been struggling with this, too. For me, I think a professional Dx would mainly be to tie up "loose ends" - I already know I have AS (after 50 years living with the tendencies, I've finally decided to take ownership of them.) As someone wrote very eloquently elsewhere on this forum, understanding is more important than diagnosis (or words to that effect.) As long as I know what my tendencies are, I can choose to deal with them in whatever way best suits the immediate situation.
If & when I do get diagnosed (I am going to ask my doctor about it the next time I go for a checkup), I don't plan to tell anyone where I work. I've already told a couple close friends (these are people I *really* trust - not casual acquaintances.) I'm not sure if I'll tell my family (mother & sister.) I mean, they already know me - why do I need to give myself a label?
As for the friends I've told, the value of them knowing is that they might be able to deal with my "quirks" a little better, if they have some idea of what to expect. Since I feel comfortable with them, I'm much more likely to "slip up" & say or do something they could misunderstand. (I really want to keep these friends!)