The only time it would be a disability is if it really is a dis-ability.
I do not consider sociopathy to be debilitating all the time. The same can be said for claustrophobia. A mild form of it produces discomfort the person can control. Severe cases would qualify for more drastic treatments.
So, it may be true there are more sociopaths in business. I would not refute that. But whether the sociopathy is debilitating is to be examined. And that, I would assume require assessing the individual if they are happy with their life.
http://mic.com/articles/44423/10-professions-that-attract-th...
Being a great businessman doesn't mean he's less likely to be a sociopath, it actually probably means he's more likely.