> Why can I focus for hours on a game but procrastinate when writing an email?
OK I got a bit triggered by this sentence. Not at TFA, but sharing my own experience: Games are fun. And I don't mean Type 1 vs Type 2 fun and the email is somehow type 2 fun. I mean that the stimulation / "hit" from a game is just higher than 90-99%% of work tasks (writing a new CLI or optimizer excluded!!). We pile on much stimulation to the work to get it to hit harder: Working by others (social/peer), snacks (biological rewards), free caffeine, money (sometimes lots), etc. And physical trinkets.
We have studied this to death in other parts of our own biology, like food. Unhealthy food/drink is fun. It's a pleasurable reward sometimes, but if it forms the basis for your diet you are going to have a lot of trouble enjoying healthy stuff. You can't outrun a bad diet. You can't add a kale salad after a bowl of ice cream and expect your insulin levels to go down. You have to treat the underlying problem: A hugely stimulating / rewarding thing is displacing the healthy stuff. Almost every piece of sane health advice after 1900 has focused on removing unhealthy factors first.
Work/hobby is no different. When I'm obsessed with factorio (it happened a lot once or twice), I find it harder to focus on work. When I "fast" from those "treats", work takes on new enjoy-ability. Dopamine diet is probably the wrong technical term, but it nails the practical effects well.
I'm sure phones are just as stimulating for some. We all have our vices.