Nobody should feel forced to work more than they want to. (The abjectly lazy aside.) But we should also be free to work as hard as we want. And to freely associate with those with similar preferences.

I used to love burning both ends of the candle. It was invigorating. I didn't ruin my health for it. And it gave me life lessons I could not have learned any other way. The fruits of those years, as well as finding other interests, nudged me to a different preference. Which involved new (or changed) colleagues. I don't see why, to be satisfied with one arrangement, we must denigrate the other--they're just different solutions.

Work and life don't balance on a scale. The dynamic is more like homeostasis. One's stable ratio depends on a variety factors, extrinsic and from within, and what makes one person happy will be ruinous or lethargic for another.

Surely SpaceX employees are there by choice. How many of their employees have no better work/life balance employment choices? I would guess a rare few.