Because of the way toxicity works happening slower is quite relevant. Similarly if you drink a bottle of vodka slowly enough you will have no significant health effects but if you drink it in 2 minutes then it’s not going to be great.
Different poisons have different accumulation characteristics. The relevant part here is that perfluorocarbons are fairly persistent in your body. Your body needs a few hours or a day to process the vodka, but the PFAS in your blood takes months/years to leave your body.
