This thread of comments seems to be getting somewhat off topic. I believe the point being made by open3dlabs is that copyright is basically a pay to play system for corporations which is obviously unjust. You're right that copyright isn't enforced on individuals, but DMCA is definitely enforced on small content sharing sites which have little to no recourse compared to large corporations that can flagrantly break the law.
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Exactly. It's like the Clean Air act. Nobody's coming looking for your wood stove but they'll happily pull a million bucks out of some podunk business who's maintenance guys were foolish enough to use up an old case of paint that predates whatever the modern VOC regulations are.
Just because individuals aren't an enforcement target doesn't mean enforcement isn't happening.