I agree with everything you're saying. All I'm saying is you won't find much sympathy. People really like honking, and it's probably not politically tenable to legislate that away.
Loud honking (especially at night) is a common complaint that New Yorkers frequently empathize over. Keep in mind that fully 78% of households in Manhattan don't even own a car, so way more people are annoyed by honking than ever do it.
And it's already illegal, no further legislation needed. The issue is with enforcement.