There’s a concept known as attention residue. And every single time you respond to a notification. Every single time you look at your phone, you deliver or give a piece of your priceless attention to that notification. And if you do it a hundred times a day, then by the end of the day, you have zero focus. I was in a high-quality hotel relatively recently, and I ordered a large bottle of Avian water, and I kid you not, they delivered 11 bottles of Evian water. You want to talk about the mistakes being made? It is stunning.
There are very few people who are fully present and yet one of the traits of the great geniuses is this, they could spend long stretches of time in acute focus thinking about one project free of distraction.