If you laser-focus on making money, then eventually you become pretty good at it.
If you laser-focus on educating people, then eventually you become pretty good at it.
I don't think you can call putting 500 people in an amphitheater in front of a single person and a blackboard remotely "pretty good at educating". It's one of the worst ways ever to transmit knowledge. And it shows.
I once reviewed statistical data for high school level success metrics across countries. It is statistically observable how small a correlation there is between class size and education quality
A good teacher can engage 50 students as easily as 500. Some of the best classes in my life have been in 200 people packed amphitheaters.
Maybe if you're sociophobic.