I prefer to be delusional if it means that my account is safe even during highly volatile times whem other brokers go belly up because they can't shoulder the negative account balances their insane clients caused and can't cover.
First off, the margining system makes no sense. I can be completely hedged with an instrument with -.9 correlation, brokers treat all positions separately and as risk increasing.
If I'm short various global ETFs and try to go long in a Japanese equity, my risk would actually go down, not up. I'm not talking about pikers buying TSLA with everything that's available.
The margining system does not protect anyone, if severe movement happens in the off-hours then the broker is going to fold anyway.
Why do they accept these insane clients then? They're free to stop providing services.
Maybe make rules that penalize people who need to be penalized?