However, we are also currently dispensed from our duty to attend Mass on Sundays, correct?
Those giving the dispensation (i.e. Modernists Bishops) don't have the faith, so i'd argue their dispensation is invalid.
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One could argue that it may be a valid dispensation ONLY for those who are in bad health. However, if one goes to mass, and ultimately dies because they contract a virus/illness, what a sacrifice/grace that is! How much purgatory time would that take off? I'd say a lot!