I just really fail to comprehend why “5” is a perfectly feasible number of days in the office on a set schedule and “3” is a pipe dream. No one thought it was

I just really fail to comprehend why “5” is a perfectly feasible number of days in the office on a set schedule and “3” is a pipe dream. No one thought it was weird to close offices sat/sun, why would that change (now that we all have remote set ups by force)?