They didn’t win because of DRM. They won because of the regulations that grant a monopoly for a specific term in the form of a copyright. Society has recognized that incentivizing creative acts requires a temporary grant of monopoly to ensure the necessary scarcity to make money and recover the costs of creation. The real problem is Disney keeps expanding that time period so things never enter the public domain

they didn't win by attacking piracy head-on though, they made capitulation easy & nice enough for us to happily go along.