You forgot some of the other pros for the DSLRs.

Pros:

A real viewfinder, faster operation, faster response between pressing the shutter and taking the shot, typically longer battery life, holdable by people with big hands, thanks to low noise can take flash free shots when prosumers don't have a chance.

P.S. the DMC-FZ50 doesn't really have a 750mm 21x zoom, it pretends to have one by cropping the image to give the effect of zooming beyond the 420mm of the lens. You can get the same effect on any photo from any camera by just cropping it.