I’ve been 24/7 do-not-disturb mode with all notifications disabled, for the past 10 years. It’s been wonderful for “intentionality” and agency over my time. I use my phone when I want to do something on it, not when the phone beeps and buzzes telling me to use it.
I don’t even whitelist anyone anymore. If it’s important they will leave a message and I’ll get back to them.
You have to remember that not that long ago it was simply impossible to reach most people who were not at home or at work. Because it was impossible, nobody felt slighted that you were unable to read their message or take their call immediately. And nobody felt any anxiety about leaving the house for a few hours to shop or go to a movie or a ball game and being unreachable. Loved ones managed and life went on.
I don’t even whitelist anyone anymore. If it’s important they will leave a message and I’ll get back to them.