The government doesn't care about a hamster forum. The entire point is that they don't care enough about the unintended consequences of their constant power grabs. They don't care about the kids either. They just need a way to paint every individual as a criminal so they have an excuse to exercise their monopoly on violence.
Any censorship resistant rebuild of that hamster site will be paraded around as proof that it was really a CSAM site in disguise all along.