is suitable for someone with learning disabilities, such as Dyslexia among others, and that doesn't require difficult to obtain skills like college or trade skill training before obtaining the job. (I.E. Carpentry, heavy equipment operator, CDL oriented drivers, Accountant, Laywer, etc)

Or is Mickey D's the only choice for the rest of their life?
There are organizations that will help find a job for them. It would depend on their disabilities. Talk to a social worker at your family and job services department.