I mean, the most restrictive license, the GPL, was conceived specifically to protect the "four freedoms" and prevent subsequent modifications from violating them. The "copyleft" concept was specifically designed to create an ecosystem that behaved as if copyright didn't apply in the first place.

I don't know how you can imply with a straight face that it did anything else.

I don't know how you can possibly argue that non-redistributive usage of software could ever violate the GPL -- and the other common FOSS licenses don't even have the copyleft provision, and literally are saying "do whatever you want, but I'm not responsible".