A better title would be "How Management Works in 2018." Half of being a manager is managing other's behaviors to produce a great product. The other half is managing your own behaviors -- i.e. being consistent with your communications and consistent in your behaviors. Both of those topics have been left out of this piece.
To your second point, one definition of leadership is "getting people to want to do what you want them to do." That's also a pretty reasonable definition, and the way to do that is by providing context.
I always ask 3 questions in my discussions:
What is the company's mission?
How is your team contributing to the mission?
How does the work you're doing today contribute to the mission?
If a leader, and everyone on their team, knows the answers to all three of those questions, at all times, then they will probably be very effective.
https://adamdrake.com/three-things-your-people-need-to-know....