They really remind me of being a kid in Sunday school and asking the teacher questions like "but if god created all of us, who created god?" or "what if somebody was born and raised in the middle of the amazon and never even heard of Christianity - will he go to hell?". There was always some bizarre logic-twisting response to those questions which didn't really answer them but was enough to try and shut you up.
Similarly, if you say "Agile doesn't work because X" - they will say "thats not REAL Agile...". But if you say "Agile is dogmatic" they will say "Agile lets you do what you want, its not a dogmatic rule based approach".
So there is simultaneously one "real" way of doing Agile and also no real way because it is not dogmatic.