> Problems do tend to look a lot simpler once someone else has solved them for you

This is so true. I wonder if there's a law named for this phenomenon?

Off topic, but I find many managers fall into this trap. I.e. they don't recognize the difference between when someone exceptionally bright solving a problem very quickly and just moves on vs. a mediocre thinker who takes an inordinate amount of time to solve a problem, but then advertises their accomplishment like a metal of valor (and managers typically fall for it).