Weaponizing our own property against us, mandating that it spies and tattles on us, turning inanimate objects into policemen to construct the most total surveillance dystopia, is not in any way "reasonable". In no way does it "preserve privacy".

And let's not pretend there are not already many other ways in which child abuse is detected and fought. When schoolteachers or doctors or neighbors or other family members notice something is amiss, when a CSAM group is infiltrated by police, or when a predator falls for a honeypot. This triggers an investigation, and at that point no digital lock can withstand modern targeted covert surveillance. But we are supposed to pretend none of this exists, and that encryption is an unassailable castle, and play along with the "going dark" lie, despite being more surveilled than at literally any point in history, including under the Stasi.

They only don't address child abuse, if by "child abuse" is meant a photo existing in some private shared-with-nobody hard drive, and not an actual human child being abused.