What it has done for me personally is I’ve gone in and gutted the number of notifications, because I asked myself: ‘Do I really need to be getting thousands of notifications a day?’ It’s not something that is adding value to my life, or is making me a better person. And so I went in and chopped that. Every time you pick up your phone, it means you’re taking your eyes off whoever you’re dealing with, are talking with, right? And if you’re looking at your phone more than you’re looking at somebody else’s eyes, you’re doing the wrong thing. We want to educate people on what they’re doing. This thing will improve through time, just like everything else that we do. We’ll innovate there as we do in other areas. But basically, we don’t want people using their phones all the time. This has never been an objective for us.

https://techcrunch.com/2019/04/23/tim-cook-wants-you-to-put-down-your-iphone/