Interesting thought, Fotoartist...
I don't do large prints and have always thought that, for me, the main advantage of high megapixel cameras is that they give me the opportunity to look for "pictures within pictures", i.e. the option to create images by cropping. I know this makes the SOOC purists barf but it works for me!
Nothing wrong with cropping more megapixels gives you the ability to get that picture within the picture which can be the better picture.....purists have a lot to learn about the Art of Photography keep doing what you are doing pay them no mind