I would disagree with that statement.
In my opinion it's quite normal and to be expected that those who are passionate about golf would want to use the best golf club that may give them an advantage in the game, and those who are passionate about tennis would want to use the best tennis raquette that would give them an advantage.
My passion for photography is not satisfied merely by going out and taking pictures, although that's a big part of it. It's finally satisfied by processing my RAW images in various ways, sometimes years later, exploring the possibilities of different types of processing, and eventually achieving a result, or a number of different results from the same image, which satisfies me. If the camera has produced noisy shadows or blown highlights because the scene was too contrasty and the camera didn't have sufficient DR, and it wasn't possible to bracket shots because of subject movement etc, then I'm not satisfied.
So it's all a matter of "how big am I going to print".
It's about a whole range of qualities, including tonal range, noise in the midtones and noise in the shadows, high-ISO performance, frame rates, autobracketing flexibility etc etc, as well as maximum print size that can withstand close scrutiny.
It's also about cropping flexibility. The high resolution sensor allows one to make a reasonably sized, sharp print, say A4, from a significantly cropped area in the image which might be of particular interest.
More is not necessarily better; more can mean more storage, CPU and RAM for managing files that are too big for my realistic needs, and I never printed bigger than B2.
C'mon! Don't you know that RAM and external storage are now dirt cheap compared with a good camera? I think my 2TB Western Digital external hard drive with USB3.0 connectivity, cost $129.
If you are really genuine in thinking this is a problem, perhaps you shouldn't be buying a new DSLR at all. It sounds as though you might not be able to afford it.
Whoever says he *needs* D800, and isn't already shooting with a medium format back or large format film, is probably deluding himself. I myself am a 35mm film shooter who went digital
I don't know what needs have to do with it. I think they would be rare occasions when someone chose a new camera as a result of a need. However you do need to use a camera in order to take a photograph.
I always find as a general rule that I get more satisfaction from the use of equipment which is sufficiently light and flexible for my purposes, yet delivers the maximum quality within the limitations of the format. I never limit myself to maximum print sizes. My printer takes 30 metre rolls.
By the way, Sharp has produced an 85" display with 16x the resolution of the current HD standard. It displays 36mp images and the pixels on the display are so small they cannot be seen however close you peer at the screen. The future.