So, for the record, this is
completely not true. You probably pass autistic people on the street every day.
Autism is a broad spectrum. I have hypersensitivity issues, even if loud noises don't make me fall down screaming. I tend towards obsessing over specific things, even if I don't block out all other stimuli for hours on end. I'm not naturally good at reading people, but I've been able to teach myself a fair bit over many years, so human emotions are no longer a closed book. I can look at a low-functioning autistic and understand what's going on in their head, as a magnification of what's going on in mine. And I've got a degree and a 13-year career as a coder.
I don't understand why so many people think that autism universally means needing help dressing yourself.