Even the best photographers PP their images, some more-so than others.
I know what you mean about the good 'ole days. I look at it this way though, the camera is already capturing things you eyes never could, whether that be details due to the lens zoom or length of exposure or increase / decrease in apeture to solve light issues. PP an image is just taking that a little further towards perfection.
Lets face it, if we wanted "that moment" we would paint a picture of what "we" saw. We don't really want the exact frame, more a representation of what it means to us.
PP just helps us get, to where we want to be with an image. In my opinion I would rather leave most of my images, too often I find though, to get the "PoP" "WoW" factor I need to process them.