It depends on the website hosting location. TOS, users location and relevant international copyright treaties.
It’s not a one-size-fits-all.
As a UK citizen I can’t claim my (US) first amendment right to call you a “cunt”.
It’s against the website TOS and I’m not American.
Putting a license at the bottom clears any ambiguity.
Funnily enough you’re only highlighting your own “Zoomer” naivety of law by making your “Boomer” comment.
Needs more sunlight.