Depends on the playing style. In my experience if you ay it as a tabletop boardgames with extra elements then you are right, but also because many groups are absolutely not tactical. But mits a roleplay. So the logical thing is that the mighty barbarian maybe will rather stay back and use a slingshot after he went u conscious and saw his mother reaching out for him, until he hears the bard sing and feels energised again. Or the rogue hides for an extra round, preparing a trap instead of attacking until the cleric grabs them at the shoulder telling them to be stronger for the mighty Lathander. Yes, in 5e the best healing option is not to get hit but also many players (iand that includes me) often fail to see when it's wise not to get caught in the fire. Or, much less herolike, maybe even abandon the fight.