The trouble is that of the few remaining mom and pop places, they are typically run by folks that started working early and had limited education. They are fodder for manipulation. POS systems get in or cheap/free at times, charge for the service and “surface insights”.

“You could be charging most for X”

“this is your best seller on weekday afternoons”

And these decent folks, like many of us, can have some imposter syndrome. We don’t want to look like rubes so we press the button to test higher prices on X.