I'm of two minds here.
On one hand, I absolutely agree that you should try to focus on maximizing the positive aspects of your life rather than overly focus on beating down the negatives. For instance, I'm happiest when I'm taking a lot of recreational classes outside of work, and when I'm doing that - my phone usage is not a problem - it's a fine way to spend my limited free time because I'm already doing the things I love.
On the other hand, in the morning especially it feels like looking at my phone can kinda derail my day sometimes. So I download Opal and just set a hard block (impossible to skip) from 9:55pm - 9:35am, that way I'm able to use my phone during the day, but not the very first thing in the day. I find that works well for me.