Comment by pm215

There's definitely scope for doing more of that. But notice also that of the 200 students who also got that opportunity alongside him, 195 stopped attending those lectures after just a few weeks; we don't know about the other 4 but I'm guessing they didn't all change their life trajectories as a result. So you're looking for needles in haystacks, and if you do too much of it you're providing an experience that 95% of your audience concludes is a waste of their time.