because he is an idiot.....Sie hat ein Vogel im Kopf......roughly translated, sh*t for brains.....althought actually "He has a bird in her head; birdbrain, etc....a Bavarian insult.
This is the person who has done everything, been everywhere, etc
Remember...this is the person who speaks 27 languages, including Mandarin, Klingon, and Danish......do what most of us do, ignore it.
We aren't buying what he is selling....
It is ridiculous to set a detective story in New York City. New York City is itself a detective story...
AGATHA CHRISTIE, Life magazine, May 14, 1956