I am reading some of Chesterton's Father Brown stories again, with general enjoyment. "Again" may be an inaccurate claim. None of The Incredulity of Father Brown seems familiar, so I doubt I had read it before. I noticed a strand of intellectual flaw in the Sherlock Holmes mysteries that I find showing up in milder form in GKC. We marvel at the cleverness of the detective in discovering the one solution - overlooked, counterintuitive - that the others cannot see. It's great fun, and Chesterton uses it to make the repeated point that our standing assumptions, the cultural ruts which guide our thinking, are often flawed and misleading.
Doyle has a similar intent, though he tends more to draw our attention to physical details we have missed rather than cultural assumptions.
Yet when one sits back and looks at such things, they suddenly look less reliable. Holmes wants some information about the origins of a goose and can't get it by direct questioning. But the man has a sporting newspaper and a particular cut of beard, so Sherlock knows what to do. "When you see a man with whiskers of that cut and the Pink 'Un protruding out of his pocket, you can always draw him by a bet."
Father Brown does not express such certainty in the several conclusions he makes along the way to solving the theft or the murder, but the difference seems mostly stylistic. Brown is a humbler, less-forceful person than Holmes. But he makes observations about the character and tendencies of millionaires, or those who dabble in Eastern religions, or bolsheviks, or those who express particular heresies that he asserts are pretty generally true. Once you know it's there, you see it pop up in half the stories.
This hasn't ruined either set of stories for me, and I hope not for you.
I am undecided whether this occurs because the genre was new and some of the rough spots hadn't been sanded down yet, or because this idea of piercing the veil and seeing hidden things clearly was especially popular in English culture of the era.