As a clinical counselor, I have to reduce as many distractions as possible when I meet with my clients. My first month on the job, my phone was on vibrate sitting on my computer table and started vibrating due to a text message. My need for professionalism kicked in hard, I apologized profusely to the client, and put my phone on silent.
Months later, an accidental alarm was on my phone for something completely different that went off. In between sessions, I found Do Not Disturb and for the past six years have left my phone on this mode. Of course, if there is an emergency, my wife can contact support staff to get me, but I have yet to need that.