First off, Haley, your original analogy of silly father and wise mother has nothing to do with moderates vs. extremists.
Moreover, extremists far right and far left exhibit the same short sighted psychology, and share a Saul to Paul interchangeability — communists agitators in 1930s Germany made great Nazi converts. That’s why so many bitterly disappointed Bernie supporters ended up voting for the other extremist, Trump.
No reasonable person would argue that Bernie isn’t pointing in the right direction. It is how he exspects to get there that is the problem. The law of the universe is moderation. Any serious veering away from moderation ususally ends in tragedy, either war or some form of economic chaos.
Bernie represents that old saying that the road to hell is paved with good intentions.