That advice is common but outdated. Skipping days can make a psychological difference because the contrast between medicated and unmedicated is so stark but you don't actually restore pharmacological sensitivity in a week or two.

You never get that first superhero feeling back because you can't go from being non-functional to functional for the first time in your life again. Being medicated starts to feel normal (which is good) and being unmedicated starts to feel really horrible (which it is but you didn't have context for how bad it was before). For me I skip doses solely to build up a back stock for when there is inevitably a shortage or prescription delay.

A lot of people think that the meds aren't helping after a while because of that first incredible phase where you feel like you can do anything. That's not what they're supposed to do for you. They're supposed to make it possible for you to control what you focus on. The actual work of completely rewiring your brain is intensive and exhausting and realistically can only go so far. Somehow that doesn't get properly communicated to people who are recently diagnosed.