I just wanted a system for my phone to stop getting in the way of things I was already doing. This simple rule means I don't need to touch the volume controls anymore, because I don't need to. For example, I use a Work mode during the day that cuts out almost all distractions. I don't need to be distracted by Instagram or LinkedIn notifications during work hours, and using a Work mode setting lets me cut those out. Things work the way that they should.