My ds is now 18 and has asd, severe learning difficulties and is non verbal so know exactly where your coming from.
I too would most definitely rather he didn’t have asd and the other difficulties and find it difficult to understand why other parents say they wouldn’t change a thing, I think why would you want your child to be so dependent on you constantly fighting their corner so they get everything that they are entitled to, and not do things that others my sons age are able to do like learning to drive, going to university, getting a girlfriend/boyfriend, getting married or having a job.
My ds is going through a big transition in 2019 with leaving sixth form at his special school (who have been amazing) and starting college and day services so he’s got alot of change happening as have we trying to get the right placements for him.
I think having a child with special needs or indeed any other issues you worry more about their long term future as in our case our ds is unable to contribute to any meetings we have about his future goals, its more what my dh and myself feel he would want and could enjoy doing to aid as smooth a transition for him.
Were also thinking ahead as to future supported living for him and looked at a few places but that wont be for a few years until he’s settled into his new daily routine and we find somewhere that meets his needs, but I do especially at the moment get days when I feel very sad and teary with the thought of me and my dh having to plan out his future because he’s unable to, infact at the moment it's quite exhausting but at least we know we've done our very best for him.
I think it’s possibly highlighted more as his sister is due to sit her gcse’s and is really focused and knows exactly what subjects she wants to do at sixth form and her career path and we have discussed with her what she wants to do but its been her expressing her wishes not us guessing what we think is best for them.
On saying all this we love him unconditionally he has achieved more than I would of imagined he could ever of done and I think alot has to do with his placement at his special school and it was the start of him being the best person he can be.