They got lots of consultants in from MindGeek who own Pornhub etc. and several age-verification services. They told the government that the consultants who were raising issues were overreacting, and the government believed them because obviously the world's largest porn company wouldn't encourage them to enact a law that would do bad things to the porn industry. They didn't stop to think that the law as written means there's now a requirement for smaller compliant porn sites to either spend more than their total revenue implementing an age-verification system or buy in one of the ones MindGeek own.