It's like saying, "No clock can be absolutely precisely in keeping with the Earth's rotation around the sun, so there's no point in trying to track time; we should all just like, do stuff whenever." Trying to invalidate the core concept of weight loss (which she even acknowledges is true!) on a technicality and willfully ignoring the simple common-sense answers is some classic fat brain thinking. And in the comments, more dumb cows responding as if this assessment is the slightest bit valid...