Many objects are too dim to see with the naked eye even if you were close enough to see them. Even amongst those which are clearly visible, they’d appear quite a bit dimmer than they do in a long exposure photograph.

The Orion Nebula is a good target for grokking the difference. A long exposure photo with a DLSR (which will be blurry if you don’t have tracking) you’ll see lots of color. Through a pair of binoculars, you won’t although you will see the nebula.