People are generally more forgiving when you perceive your employees' disability in a positive light instead of viewing their disabilities as something to exploit.
It's a subtle difference, but the first one encourages/enables the employee to function in spite of their disability or perhaps one day overcome the shortcomings, or simply work in a way / environment where it becomes irrelevant. (Software development already gets us 90% of the way there)
The other, well, that one doesn't really give a shit as long as you're productive, i.e. it will probably still exclude a large portion of autists and never really help anything. Hell it probably expects to never give them upward mobility with that last remark either.