In some (but not all) cases, this actually makes sense. Using a 7-day cycle for scheduled events is good, because scheduling is a big coordination game; if some people scheduled their events to happen every 7 days, and others scheduled them to happen every 8 days, then it would be much harder to keep a routine.
(Although if an event is something that people are likely to attend once, rather than repeatedly, then it may make sense to schedule it for different days of the week, so that conflicts are more likely to block only one occurrence, rather than every occurrence.)
In some (but not all) cases, this actually makes sense. Using a 7-day cycle for scheduled events is good, because scheduling is a big coordination game; if some people scheduled their events to happen every 7 days, and others scheduled them to happen every 8 days, then it would be much harder to keep a routine.
(Although if an event is something that people are likely to attend once, rather than repeatedly, then it may make sense to schedule it for different days of the week, so that conflicts are more likely to block only one occurrence, rather than every occurrence.)