This paragraph distills the truth about copyright. It would be unconstitutional without fair use!
But, really, what it all comes down to is this: the Supreme Court itself has repeatedly said that fair use is the "safety valve" that makes copyright law compatible with the First Amendment. Without it, copyright law would be illegal. Many of us, of course, believe that the valve is screwed way too tightly, and that it needs to be loosened, since free expression is regularly stymied by abusing current copyright law. But, either way, it should be clear that fair use is, without a doubt, a key element in any copyright regime. Without it, you have undermined free expression and enabled out and out censorship.
LINK:
https://www.techdirt.com/articles/20150427/18110930817/if-youre-promoting-copyright-without-fair-use-youre-promoting-out-out-censorship.shtml