Danger of Agile Dogma

When ideas become dogma:

In Agile, the developers have to sit at the end of the row along the open hallway when everyone’s collocated. The business analysts have to be in the middle because they have to communicate with everyone.

In other words there’s a seating chart for an Agile team area. Or,

Sprints are always 30 days. It doesn’t matter if the product owner and the Scrum Master and half the team isn’t available, you can’t add a day to the project. That isn’t Agile.

And I thought the principal was responding a change over following a plan.