> consider that this can't drive a car, so it's not fully general

So blind people are not general intelligences?

A blind person does not have the necessary input (sight data) to make the necessary computation. A car autopilot would.

So no we do not deem a blind person to be unintelligent due to their lack of being able to drive without sight. But we might judge a sighted person as being not generally intelligent if they could not drive with sight.