In a sufficiently competitive environment, players abandon a value for a temporary advantage. When other players follow suit, that value is gone, but the playing field is still level, and everyone is worse off.
Weekends are under threat because our jobs are. Everyone's keeping their head down to make it through the next round of layoffs, to avoid getting replaced by AI, to avoid a protracted job search.
Related: https://www.slatestarcodexabridged.com/Meditations-On-Moloch