It will make more sense if you know that, by "amateur", I mean someone who knows something about image processing, but not enough to build an image processor--someone whose expertise is in something else: photography, public presentation, UI design, etc.

I should have worded my final sentence differently, but in the sense that someone who knows enough about database engines to be able to use one but is an "amateur" at creating them can still use SQLite to build an app incorporating a database engine, my "vision" would let developers whose expertise is not in image processing engine implementation to write apps that incorporated a sophisticated image processor.

Please note that I wasn't the person who you replied to before. In fact, part of what I do professionally involves UI work, so clearly I don't regard UI design as merely work for amateurs. On the other hand, I also find that 90% of the skill in building a good UI has very little to do with knowing how to make dialog boxes and toolbars appear. The functionality behind those UI elements, how that functionality is organised, and presenting everything as clearly and ideally as simply as possible is often far more important, IMHO.