"Privacy is important, but we’re talking about *public* posts. Ideas."
If you believe there is a public benefit to posting with your real name instead of a nym online you are several steps away from claiming we need digital IDs in order to have a voice online. This is the point you are making several times now, and claiming you are not or "lol, wtf" ing as if I write in a different language.
Ideas do not need to be signed with a government approved name to qualify for a discussion/debate.