The time I'm least likely to have my phone with me is when doing things like starting the laundry, or starting the dishwasher, or grabbing the last soda in the fridge, or similar stuff around the house, where I may have left the phone somewhere else in the house.

Pretty much every other time the phone will be in my pocket and the value would be less. But even then it'd mean fishing my phone out, unlocking, starting an app instead of just pushing a button. Not torture by any means, but if I can just stick a button there and not have to think about it again, then awesome.