Some people behave weirdly for getting high-ranked id, leaving aggressive comments for someone who added a first id to their unknown observation, not motivational at all for iders. So there’s a question why people care about species so much and not about other humans.
And as already was said common doesn’t mean easy, you can easily id Carabidae from any blurry photo, but without being an expert (and we only have like 2 people checking them in Europe) you won’t id most of species in the family. I don’t see how using from unknown, insects or beetles to Carabidae (as an example) is obsolete, as well as cases where you can see it’s a Fringillidae bird, but you can’t be sure of species.