If you and your teams find yourselves talking about, coaching, or leading methodologies in absolutes, you are missing the point of them.
Agile is a better way for software development but it’s not the only way. Lean is a better way for process improvement, but it’s not the only way.
When in doubt turn back to the agile manifesto, and you will be re-grounded:
“We are uncovering better ways of developing software by doing it and helping others do it…”
- Neutral is Negative
- Simple is not Dumb