He didn’t have any answer as to the fate of new bag holders he created with his tweet. That was irresponsible. His plan to make hedge funds disclose their positions daily as some kind of a solution to overleverage makes no sense whatsoever. And he’s delusional about research skills of WSB posters as compared to Wall Street analysts.
I don't know what answer you expect him to give. Are you saying that people shouldn't be allowed to tweet their trades? Also it's ridiculous to think WSB isn't full of bagholders - I've seen people blow up their accounts on completely ridiculous trades they had researched on their own. Are you saying people shouldn't be allowed to make bad trades?
Chamath answers the question correctly; the question you're asking implies that you don't think retail should be trusted to invest. If that's truly what you think then say it proudly.