Why would he do well in an office job? I think for a lot of people on the spectrum that would be sensory hell and more likely lead to burn out then an ability to live on your own and take care of yourself. Not to mention all the social drama and potential workplace bullying could also be quite hard to deal with....but not everyone with autism is the same, maybe some would do well in office jobs but I know if I was able to work I'd avoid jobs like that.