Does the Identify form suppress observations with Community ID: "No, it's as good as it can be"?

That’s unfortunately the current situation. The alternative is to vote on this feature request that’s aimed at exactly the situation you describe until it gets the attention of iNaturalist staff.

I disagree that voting “no evidence” is the best course of action because often enough there is evidence, but not enough to meaningfully ID it. In addition, the flag “as good as it can be” covers cases of multiple species in abandoned observations – something we’re bound to see a lot of as a result of events like the upcoming nature challenge.