That's not necessarily the case. Look at Temple Grandin. She definitely needed help at the beginning of her life - but "look at her now"!
I probably over-stated. Some people can live on their own just fine and have successful careers. Their Autism does not hold them back all that much. But some families do have to worry about children who are likely to never live on their own or have regular careers. That kind of Autism is out there.
Temple Grandin is great. Also a girl named Carley, I can’t recall her last name. The 1st book I read after my grand son was DX’ed was written by Carley and her father. I used to follow her on FB but she was to liberal for me to tolarate so I no longer follow her page.
The thing I remember most about Temple Grandin is that she is an expert on designing cattle yards...or, those things they run cattle thru. I forget what they are called...cattle shoots?