I disagree.Perhaps “heroic” is a better word. Having to run home after 1 hour of dungeon delving doesn’t feel very heroic.
I frame it as dungeon delving is truly dangerous. Your characters are shipping out to fantasy war, and one hit could kill them. So better fight clever, fight hard, and stick together. Retreat and live to fight another day, and deal with the clever enemies dynamically evolving defense too.
More “Band of Brothers”, less “Avengers”.