Do you have any actual experience with special needs schools?
You seem to be under the impression disabled kids are taught "disabled things" and will come out of that school shocked at all the people in the world not using wheelchairs?
An extreme example but definitely the tone of your post.
In regards to "not having choice", did any of us have any choice what our syllabus was at school?
In regards to the untrained teachers, staff "not really helping" that seems to be an isolated experience with a bad school. It won't be the case everywhere.