Just to add a couple of thoughts…
The one place I can think of where this might make a meaningful difference in behaviour is in L3 demotions. If the L3 attendance counter is ‘wrong’ then someone might get demoted for missing the 50% attendance target, when they hadn’t in fact missed it.
I have one member with a 100% attendance according to Data Explorer - 290 days straight - who is showing as only 97 out of 100 on the L3 requirements page.