[petercooper]

Is it because people disagree? Because that isn't a reason to downvote.

It's a common and legitimate reason to downvote on HN, even pg has said so. I once disagreed with this practice but have changed my mind given it has been 'approved'.

And to say Jobs was a salesman because he didn't "design" any hardware is bizarre. He was the driving force behind the Macintosh and involved in almost every decision surrounding it, even if he wasn't the one with the pen at the drafting board. It's like saying Obama is merely a spokesman.