Action entails risks and consequences. Mere thinking doesn’t. In our litigious society, as soon as someone finally does something, someone else can become wealthy by finding some fault in it. Meanwhile, a less fussy and more confident world abroad drills and builds nuclear plants, refineries, dams, and canals to feed and fuel millions who want what we take for granted.
Finally, high technology and the good life have turned us into utopians, fussy perfectionists who demand heaven on earth. Anytime a sound proposal seems short of perfect, we consider it not good, rather than good enough.
I've noticed this myself--I have zero power to affect a refinery or anything useful, but I've been putting off small projects because I doubt my skills.