it is a jigsaw
Once completed, a favorite jigsaw puzzle - if not sealed and hung on the wall, keepsake art - is only redone once every few years. It's practically unheard of to bring it to quasi-completion, then pick out pieces, half-haphazard semi-definable chunks, to try again tomorrow, or next week.
But, that's what Termina's citizenry demands. Each time the loop is reset, the moon rehung, little bits of memory, slicing crackwise, become their own buttresses against the endless press of the moon. Without their tapestry-like fit, all together, the world would be just an asteroid, one rock flying up as its orbitor falls down.