Mouth to mouth resuscitation
It might be the best way to save someone in distress.
But it doesn’t scale.
You can only offer this sort of lifesaving intervention to one person at a time.
Often, we get stuck because we try to take our useful local magic and somehow make it for everyone. Perhaps we’ll need a different approach when it comes to serving more people.
Not because it doesn’t work. It does. Because it doesn’t work at scale.