This is probably the most damning thing about capital-A Agile. If you try to talk to a certified Agile practitioner about what kinds of projects aren't appropriate for an Agile process, you might get dismissiveness, you might get hostility, but you'll never get a frank and engaged conversation.

Heck, if you ask an Agile coach when another agile methodology like Kanban or Shape Up! or Lean-CMMI might be preferable to Scrum, they'll act like a Free Evangelist preacher who just heard a member of their congregation say something nice about Methodists.