yes i understand what your all saying, its just that i find landscapes in particular done by the pro's so unatural looking yet we all strive to achieve the same look.
Forgive me if I've got this completely wrong, but I'd guess that when you're looking at pro's work you have no idea what came out of the camera and how much PP work it's had.
Landscape photographers are dedicated to light and form, they get up at ridiculous hours and trek miles to wait for the right light in the right spot. Your assumption that all those pink and red skies is the result of PP is based on what knowledge and experience?
Have a proper read through the comments above - there's probably hundreds of years of experience there - and the general gist of the attitude to PP is that it's part of the process to enhance a photograph that was taken - not to completely change it.
Photographers know that an image starts with planning, then capture, processing and presentation.
Some people who've just bought a camera think that it starts at the capture stage and then get wrapped up in how much PP is necessary to 'make it right', deciding either to throw loads of effort into it, or eschew PP for mediocre results and pat themselves on the back for their honesty
All of that heartache and soul searching can be ignored by putting the right amount of effort into
planning and capture.
I don't really shoot landscapes, but recently arranged a pre wedding shoot, it was timed for sunset at a location I knew would be interesting if we were lucky enough to get any colour in the sky. A couple of hours before setting out I knew that the sunset would be nice - because of the cloud formations. I packed off camera flash to make an interesting balance with the sky, and the shoot gave me exactly what I wanted.
Most people's instant reaction to the result is 'it's amazing what can be done with photoshop'

. Any experienced photographer would tell you exactly the planning and effort required (not great) to achieve the same result. That shot is the result of planning not processing.
Back to the PP bit though, when processing that image I had quite a free hand with the depth of colour in the sky, because it'd been carefully exposed and because I'd put separate lighting on the couple. The shot SOOC was nice, the end result was an improvement on that.