1. Product owner vs. product manager

    A Product Owner is focused on output i.e. how quickly can we build these features?

    Product Management, on the other hand, is focused on outcomes i.e. why are we building these features in the first place?

    Typically I've heard these defined exactly opposite.

  2. We optimize what we measure

    Scrum does not say “only focus on output”, but, unfortunately, humans will optimize for what they measure.

    If you worry about story points & hitting your estimations, that’s what is going to consume your attention. That is what you and your team will optimize for.

    And that is the core critique of Scrum as it is practiced: That it focuses a product team’s attention so heavily on delivery — on building lots of features quickly & efficiently — that teams fail to focus on spending time to discover what the right thing to build is.