Probably for the same reason(s) there aren't any "good X apps" (insert whatever you want for X).
Different people define "good" differently. It's a bit unrealistic IMO to expect that the Droid will have the best in breed for every single app out there. There are countless reasons why a "good" app may or may not exist.
Have you tried contacting the developers of the Flickr apps that are out there if they intend to add the features you're looking for?
Have you tried BettrFlickr? That's what I use. It saves every picture I have uploaded to Flickr right on my phone, though it requires an internet connection. Otherwise I just use Gallery.