I really don't understand the argument that there is no specific rule for the team even. Now, it does appear that ISU regulations even say that they will apply existing rules to the team event, so they aren't following their own rules. But even if the rules didn't say that, if there is a rule, I think it's normal practice to fall back on that existing rule in a case where there is no specific rule and not to make up a new rules (that clearly reads as an exception to the existing rules just to appease Russia). You create new rules after the case is resolved. Because the case made you realize you need new rules.
Of course, the ISU is a sports federation, so I shouldn't expect logic and normal practice. Still, it makes no sense.