Well isn't this just so much fun, To say that landscape photogos know they are failures is just so much rubbish, plain and simple rubbish. So dispensing with that rather rude insult to one type of photographer, lets look at photography in genreal.
Photography is a two dimensional representation in an chemical reaction( OK digital too ) for a breif part of a second( I ignore reciprocity failure, or any failure) as focused by a lense to limit the field of view. Well of course that will not represent the whole experience of a mountain or a leaf. The photo is a microcosm. The mind of the viewer is what really brings a photgraph to life. The famous masters of photography are able to bring to life our imaginations so we can tune into the photo and remember or contrive an experience that has meaning. I do not conjecture that the meaning will be good or bad, but the most popular photos are usually pleasant.
The miniscule moment in time and the limited view of the horizon taht the captured image portrays is tha clue to our mind's eye which is stimulated and creates the rest of the experience by retrieving memory o just letting the imagination contrive the rest of the reality. What is fun about large format is taht more detail is available for the mind to assimilate and then to process and work with. This conveys a higher sense of reality. Clearly a watercolour landscape image painted on paper can please the eye and mind but has less detail. I guess that too would be a failure. I guess too that a portrait photo or painting would be a totoal failure by the first author because the person aws not able to be heard, touched, smelled etc....
So the photo is the key to unlocking the eye of the ind that completes the image. I will go out on a limb and compare it to a fragrant smell that also unlocks the imagination or memory to trigger a response.
The response to a photo is a widely varied as the truth.