I am trying to espouse simplicity myself because it appeals to me, is attractive to me, and I'm lucky enough to have the freedom to choose. I am really enjoying exploring the possibilities and sharing my thoughts about it. It suits my temperament.
We're not all the same. We're not all wired to find contentment in simplicity. Some thrive on adventure, excitement, curiosity and challenge, change, competition and energetic activity (I love all these things myself... at times). Isn't it just as well that we're not all the same?
There isn't room for us all to go back to the 'simple life' and self sufficiency even if we were so inclined.
The world population is 6,894,285,725 today at noon, and growing (www.census.gov/worldclock). It's increased by 70 or so in the time it's taken you to read this!
Meanwhile, I'm reading about the Amish......