He even admits it is theoretically possible to do it differently, but also observed people not doing it differently in practice.
For example, playing a game, or browsing youtube, or scrolling through social media, or reading the news, or even browsing HN for that matter you may think of as something you do to relax. It could be, however, that actually, doing some woodwork, or practicing a musical instrument, or learning a language, or going for a walk in nature, empirically recharges you a lot better, and you actually enjoy the days when you get to do these activities a lot more - and it makes your time outside those activities more enjoyable too.
These are just examples, it may not work for you in the same way, and all of these activities can be done in 'recharging' and 'non-recharging' ways perhaps. The important thing here is that what you think recharges you and what empirically actually recharges you may be very different things.
Many games turn into jobs. The sense of fun degrades over time, and the self recriminations aren’t baseless.