Comment by vetrom
It doesn't, but platforms basically do everything they can to claim the various common-carrier liability shields in DMCA-like laws. In the U.S. that means they forward the takedown request to whomever generated the content, and in theory should allow that generator to comply, or publish a counterclaim.
The whole system falls on the floor though when the common carriers aren't, and have low quality processes that don't actually enable the counterclaim half of this process.
Don't be fooled. These so called low quality processes are designed by large corporations in order to abuse their positions and retain control over all content being shown. The providers have no interest in providing legal protections to their small content creators. They want to focus on pleasing the big players.