I think this is right.The problem with second guessing the writers is you end up with alternative strategies that have even more plot holes than the ones you think you are fixing.
But I will say that the premise of the first is kind of a house of cards of suspension of disbelief.
"It's Sound!" is the headline on a newspaper presumably printed on a noisy printing press, to be distributed by noisy trucks to a shop nobody can visit.
I didn't have a problem with it then and I don't really now, but the more unlikely elements that the plot heavily relies on, the greater the force of will required to just sit back and enjoy it. Can't blame people if any of those little leaps of faith is the straw that broke the camel's back.