Minimal privacy risk is such a BS "advantage". You put your email out there for everybody to read it. So privacy with mailing lists does not exist

If I want to remain anonymous, I need to register another email address, which is a massive pain in the ass to register AND then to read or reply to the mailing list.

With a forum I register, chose an anonymous nickname and can participate and get updates into my normal inbox anonymously.

Also, SMTP straight up leaks your IP address when sending e-mails (the "Received" header.)