No, I think she would prefer that exchanges didn't restrict purely in an effort to "protect" retail investors and nakedly do the bidding to protect larger insti

No, I think she would prefer that exchanges didn't restrict purely in an effort to "protect" retail investors and nakedly do the bidding to protect larger institutional investors who are getting squeezed. A brokerage NOT allowing buys, sells, margins, options on a security is well within their right to do so. It's only when they start to take positions that limit an investor's ability to manage their own risk that it gets a little fishy...