Joe Rogan doesn't know his ass from his elbow when it comes to French Fries. I'd rather have McDonald's deep fry me a box of toothpicks nice and greasy, well done and salty than go to In 'n' Out and order their fries that taste too potatoey and boring as all heck. I will agree that Five Guys fries are good though.
My advice is to go to In 'n' Out, get your Double-Double, then swing by a McDonald's drive thru on the way home for your fries. I'm the Dr Sebastian Gorka of fast food and it is preposterously absurd if you dare challenge me.