As we have seen, repeatedly, laws that seem clear enough, have been questioned. Precedents, with their carefully crafted supporting arguments have been overturned. Didn’t one well known lawyer say “that depends on what the meaning of “is” is”.
Even if an argument is rejected by the court, because a law, or a subpoena, is clearly drawn, the case is appealed, all the way to SCOTUS, if necessary. If they lose at every stop, they make a new argument, and litigate that all the way up the system too. Wash, rinse, repeat, as the months, then years, pass, and nothing is resolved.
Steve