Experts were consulted, and ignored. A lot of experts came right out and said these laws were insane. The Australian tech industry were not in favour, and the consulted experts were not favourable.
However, the experts that were listened to were the ones who worked for ASIO, who said that these laws were absolutely necessary just for the agency to continue operating, and it was urgent that they were deployed in the last few days of Parliament. So the laws got rushed.