For me, the gold standard of this is Carl Sagan writings. Beautiful ideas, explained in the clearest language possible.
Most people do not have time, nor desire to do additional intellectual work after slaving away doing whatever it is they do for income.
More precisely: not just having people less intellectually exercised¹, but also and especially creating some sort of "demand" that "things have to be simple". Non-recognition of complexity is also one of the cracks allowing populism. Your duty is to "spend one further thought", while some instances seem to defend an idea of an "as-if-constitutional right to reduced consideration".
(¹ I wrote the other day, «I also believe that "Now drop and give me twenty" will return us fitter personnel than "Please, be fed from a straw"»)
I would have sworn that was from Elements of Style but apparently it's a Mark Twain quote.