

One of the saddest lessons of history is this: If we’ve been bamboozled long enough, we tend to reject any evidence of the bamboozle. We’re no longer interested in finding out the truth. The bamboozle has captured us. It’s simply too painful to acknowledge, even to ourselves, that we’ve been taken. Once you give a charlatan power over you, you almost never get it back.
Carl Sagan, The Demon-Haunted World: Science as a Candle in the Dark
I think your intuition is probably right, but also Amazon happened. You can get a grinder delivered to your house in a day or two for like $10. Nobody who cares about fresh-ground coffee is going to hesitate to invest in a grinder when it costs less than a bag of beans.