I haven't seen it, but I've been baking for a long time and came to the same conclusion. One of my exes couldn't get her mom's pupusa recipe right and kept saying her mom does it differently every time, a pinch here and a splash there. So I just stuck her bag of Masa and everything else on a scale and copied her recipe, even extra dustings and splashes of water, to the gram. They all looked at me like I was an idiot. Guess who made identical pupusas every single time?