It depends on which dimension (or PoV) because being lean - in practice - involves all the levels of the production from the janitor to the CEO while being agile is about the business or project driving model. Lean is about the company culture while agile is about the driving attitude.
Please, notice that I never even cited “to lead” or “leadership”.
I strongly disagree. In theory, it can be true. In reality, rarely happens in a company. Is the hybrid model wrong? Is SCRUM opposite to project management? Is pure SCRUM approach better performing than any hybrid model?
Wrong questions. Theory and practice always differ expecially because a business need a plan otherwise nobody will put money on it - “a man a company” case might be an exeption but it is a corner case. Hence have a business plan requires to have some kind of project management.
The “magic” is making different theories and approches works togheter in a smooth way. If this would be false, everyone that read a book (or a set of books) and follow it would be able to succeed. Which is appailing false.
One of my teacher, opened its course admitting that he started up seven business and all of them default. I am not aware if he found a way to become rich defaulting or it was a theorist but not a good business man.
My educated guess is that was conveying two fundamental messages: 1. a well managed default is not the end of the world and 2. theory is not the key of success by itself alone.
An open source project never die because its code remain available. The business related to it, instead can reach a point for which it becomes irrelevant. It hit the ground, and did not rebouced.