You really don't understand the seriousness. The law enforcement job is to find a reason to arrest you, HN posters seem to have a grave misunderstanding of how police work. They will not use info to make you innocent "anything you say can and will be used against you"
The courts job is to exonerate you not the police. Once the police start to zero in on you every incentive they have is to find a reason to bring you to court. Now you have to spend potentially thousands of dollars and a great deal of your time to defend yourself even if the case is "open and shut". Anything that makes the process "push button" is terrible for a law abiding citizen and potentially life destroying.
This is the difference between tyranny and due process. CSAM Takes away due process by automating the process of guilt. It doesn't matter if its well intentioned.
Given the potentially destructive nature of this policy, even suggesting it is a major red flag and it's not unreasonable to take an absolutist approach to the problem.
Turns out if you pander to wannabe-autocrats, people will remember.