As a writer and the spouse of a composer, I disgree. The copyright laws are too lax and limited - they should be perpetual, just like property ownership.
You write a poem about a tree. Should no one ever again be able to write a poem about a tree without giving you a royalty?
That would be unconstitutional:
To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries.
Perpetual copyrights would be a cultural disaster. Forget school fine arts programs, they couldn’t pay the licensing fees. It would be great for this generation of composers, but that’s about it, since there wouldn’t be much in the way of the next generation.