I mean, those were a headache in the days of FP+ too. I remember getting the multiattraction pass substitution three different times at AK in one day because of weather.
Yes, always frustrating even before fastpass in general, but even more of a headache when people have paid and the headache of a refund policy is not satisfying a lot right now.
The many who understand it is weather and you can't control is easier when it is free and no loss except the gamble of time strategy. If refunds are already a nightmare without that variable, it will be nastier.