They can also be useful if, as is currently my predicament, you've only got one good leg and showering daily is quite literally painfully inconvenient.
On crutches and I ride a desk at work. With the exception of the crutch in (thank you, temporary handitard parking sticker!) and the crutch to the bathroom, I don't really move much these days. I shower every other day to minimize the aggravation to the injury and my own misery, and the whole body BO killer thing has helped in that regard.
Maybe it was built for deathfats first and foremost, but normies can appreciate the utility in certain circumstances. Kinda like me and DoorDash for groceries of late.