I agree, but if you're feeling tired or overwhelmed, taking a day off is in everyone's best interest, and I don't think standing in a vertical coffin for a few minutes is an adequate alternative.
Why would this be presented as an alternative to taking a day off if people are tired and overwhelmed? I don't think it is for people who have mental health problems - on the basis that it wouldn't help, so Amazon wouldn't waste money on it if that was what it was for.