I don't think you're missing a thing. This is ridiculous as an issue, but it's all the Democrats have and they think they can exploit it. Once it's killed, again, they will ignore it and pretend it never happened as they move on to a new issue they believe they can use to win.
I have noticed all week that John Dean, who just wrapped up an appearance on CNN with Ben Veniste and Chuck Colson, is ticked that Deep Throat turned out to be Felt and keeps saying how it couldn't be him.
Earth to Dean: It's him. Felt got information from various sources, including in the WH and passed it on.
I believe Dean was hoping a Nixon crony would be the one so he could be assured he wouldn't be the only WH betrayer.