I would say heroism has plenty of cultural emphasis already, perhaps too much even. The prevalence of superhero movies, calling anyone who served in the military a hero, all of the nurses/caregivers/essential workers during covid: there are so many examples of loud proclamations of heroism in US/Anglo culture. It is clearly a value held by the vast majority of people.

I think instead we should be looking at the messages people are actually getting from all the hero worship, rather than what we think are the important take-aways. Things like exceptionalism, having strength to prevail against one's enemies, making hard decisions for "the greater good". Finding good stories to combat these potentially damaging and counterproductive ideas is where we should be focusing our cultural energies IMO, rather than more hero worship.