Great question - it depends what (or who) you’re optimising for.
I’m generalising, but as an example:
The optimal culture to get very difficult things done far more quickly and efficiently than other companies could (think SpaceX) probably often won’t have the best work-life balance. In contrast, a culture which optimises (at least partly) for employee well-being will very likely lose some edge, efficiency, innovation, drive… along the way.
There are of course myriad other variables, but there probably isn’t an ideal answer to the culture question: it all depends on what you want to do, and how you’re willing to act to do it.