I'm so glad Disney doesn't agree with you otherwise DS would never get to ride Astro Orbiter as there is not a
lightning lane. We are able to get a return time with DAS even though the ride doesn't have a lightning lane.
AGAIN DAS Utilizes the LL when available BUT that is not the purpose of DAS.
DAS is for people who have difficulty tolerating extended waits in a conventional queue environment due to a disability DAS allows them to request a return time for the attraction/show based on the current wait time. Instead of waiting in the normal line they could take a seat at a qs, use the restroom, run around not being confined to inside a line.
In fact there is not a single mention of Lightning Lane (LL) on the DAS webpage or FAQ
https://disneyworld.disney.go.com/guest-services/disability-access-service/
As far as standing in a standard que the OP states clear as day that she has special needs with anxiety with strangers and standing without the OP is stressful. I might be wrong but the way I interpret that is that, no she can not stand in line by herself.
That is certainly your opinion but as I stated from the beginning is that OP will not get an answer without asking and many have been approved for like reasons. Just because you can't see or understand doesn't mean that person does not have a disability that would impact their ability to tolerate things that others take for granted.