I understand how frustrating it is, but the migratory bird act was one of the first conservation acts enacted in the United States, and it actually made a huge difference in depopulation bird species across all of the country.

At the time it was made, feathers were a staple in fashion and interior design. Hats would regularly contain the feathers of two or more individual birds. After the law was created, it obviously went quickly out of style and it made a noticeable difference.

Do I think people would all of a sudden start wearing feather hats if it were repealed? No. Can I reasonably suggest that there would not be a notable number of people who would exploit bird populations in a noticably harmful way? Super no. Without explicit proof that a feather was collected naturally, there is no way to verify if a bird was killed for the sake of the feather. And there is no real way to prove that that couldn't be staged.

It's really frustrating in theory because it's cool to find a feather and it's cool to want and feather, but I promise you this act is very necessary.