> Or, we come up with a system that actually follows the rhythms of nature, rather than forcing a standard schedule year round.
The clock-driven day is one of humanity's greatest inventions. You can't build a spacefaring society on "following the rhythms of nature."
Eh, we still have timezones, and a spacefaring civilization will most likely at least use a time that matches their planet’s cycle.
Eh, I say give it a try. Worst case we don't get to space but have a good time.
I understand the heat death of the universe is inevitable and the fate of our species depends on shedding our earthly bonds but, I think we can conform our daily habits to our present reality without sacrificing a distant future spacefaring civilization.
Rigid timekeeping does not preclude compensation for the sun.