Perhaps another aspect is the issue of mortality. Those (grey haired old gits) who played with Grasshoppers and such in their adventurous youth, are now only interested in building nice solid, safe aircraft that they dreamed of when they were young and invincible. Not many of the 'simple, cheap, easy to build' aircraft are being built now.
So when a younger person sees an old bugger building a complex, years-to-finish work of art, they understandably turn away.
Add to that our current risk averse nanny state, and is it any wonder that the old fashioned kind of adventure from when we were young has died out?