People are doing sims all the time when trying to come up with the best line and I have hard time understanding why people trust them so much? Even the genius Sauce missread villain´s range pretty often (I assume so after watching his videos) and if you do so the sim is worthless.

"Standard range" is different for different players. Many players also sometimes deviate from standard play just to trick their opponents.

I would appreciate if someone could explain to me what I am missing here?

Thank you!