He's the richest man in the world. For a lot of people, that's enough to earn their admiration. There's this warped perception that if you have a lot of money, there must be something exceptionally positive about your character.
It's the Just World Fallacy/Hypothesis. The belief that "you get what you deserve", good or bad. It's at the root both of a lot of hero worship and also at the root of a lot of unwillingness to help people who are struggling out of the shared belief that you must have done something to deserve where you are - good or bad.
Also the techbro dream - the marketing has worked for his image, and he's the ideal of a smart, successful, techie, engineer - although realistically he's only one of those