I don't disagree, but one of the challenges is that humans have become really good at synthesizing devices that artificially give you that sensation at the expense of future regret. We call them "games".

For me, playing a good videogame (I'm particularly prone to Minecraft and roguelikes) exactly gives me that delightful incremental reward lost-in-the-process flow state. It's so good that I can lose myself in it for hours.

But then when I look up and see I've spent the entire night on it, I regret the lost opportunity to do something more meaningful for myself and others. So, for me, I try to seek out activities that blend enjoying the process and enjoying* the outcome. Too much of the former feels like a waste of time. Too much of the latter feels inauthentic and like a grind.

There is a sweet spot in the middle for passions that do involve some chore and grunt work, but are also joyful and leave me with an artifact I feel good about and can share with the world. That positive outcome helps motivate me to get through the un-fun parts.

Of course, if you don't feel regret, then by all means game away. But I do. Beyond a certain point, playing games feels like eating junk food. Gloriously satisfying during, but unnourishing and regretful afterwards.