The vast majority of people on the planet are forced to be "productive" for most of the day so they can just have a few short moments at the end of the day or on a weekend to be "at peace with and bask at merely existing". Because if they didn't the alternative would be starvation of themselves or their loved ones.
This article is all a very "bourgeois" perspective. There are many things us middle class people could do to cut complexity and simplify and live in the moment. But the origin of "the hustle" is frankly just the material reality of every day existence.
It shouldn't really be a surprise that after people get past the brute force problems of not-starving, they run around pushing with the same productive drive elsewhere in their lives and producing needless complexity because it's just part of the fundamental drive that stops you from starving in the first place.
Also once you have kids, "striving for a future that never arrives" is frankly just part of your fundamental being. You will (hopefully) die before your kids or grandkids die. The moment you hold that child in your arms for the first time.. a huge part of you willingly and with deep love begins sacrificing a huge part of your present for a future you will never see.
I love skiing -- among other activities -- because it puts me in this mental space described in this article. But I also see that pursuit of this comes with its own problematic aspects. It is actually super easy to get caught up in the "live the moment", and lose grasp of the obligations that we have to those around us, or to responsibilities that actually bring long-term satisfaction.
I actually think our society has far more of a problem with people pursuing self-satisfying personal fulfillment (at the expense of social responsibility) than it does with people being overproductive.