Most of these cases are not more related to whether the FTC (or whatever agency in question) is/should be allowed to make the rule at all. It's not really about

Most of these cases are not more related to whether the FTC (or whatever agency in question) is/should be allowed to make the rule at all. It's not really about the rule itself. Obviously the specifics of the rule will play into that, but it's not usually about the merits of the rule itself. It's good that these cases happen. The agencies should be kept in check, they can't just make stuff up as they go. There is a reasonable position that some folks take - that the agencies were never intended to have such broad powers and have vastly overstepped their bounds.