I just had some contrary thoughts and realized it's sort of inherently unfair to be having this debate where anonymous contributors can't comment without revealing their identity: So here's the opposite position.
Anonymous submissions can help promote frank dialogue about sensitive issues such as mental health, race, religion, sexuality, or just promote advice seeking and giving. I could see why people might want to go anonymous.
I notice that certain sex-themed streams like "boobs" and "booty" tend to have a good portion of anonymous submissions. While seemingly superficial, even these streams in their own way help people get more comfortable being empowered and creative around their own sexuality.
So maybe a middle ground would be to continue to allow anonymous submissions but maybe have more aggressive moderation of anonymous submissions that seem to be borderline.