A single good teacher can make all the difference in the world.
Nations like Finland and Poland have figured out how to make that change and seen their students flourish; hopefully we will too.
Doesn't that mean that a lot of people will never be on the receiving end just because they did not win the teacher-lottery (arguably the chance of getting such a teacher is rather slim)?
Shouldn't our systems be more robust? (Not talking about normalizing these effects down, but creating a better environment for everyone, using these effects en masse)
We need our very best to go into teaching. It's the ultimate multiplier role.