Again, just because there's many content creators doesn't mean the content is interesting. Whales and dolphins (mostly) got to be where they are by having the best content, and sharing it consistently. It is natural that their content will mostly be more interesting, and attract more engagement as a result.
That boost that newcomers get... it comes from whales, who are looking for new content creators that are worth supporting.
Most of the posts I've seen encouraging engagement (that were initiated by whales and dolphins) go something like 'Has (favorite cypto) finally peaked, or can it go further?'
I'm not saying your argument isn't valid... maybe there's a bunch of great content out there that I'm just not seeing for some reason. All I'm saying is that MOST of the small accounts I have seen, haven't been worth engaging with.