In that specific case at least the FBI is asking Apple to produce new firmware that will bypass existing protection on an existing device - basically asking Apple to root a locked down phone which would likely require them breaking their own encryption or finding vulnerabilities in their own firmware. This is not exactly technically trivial since anything of this sort that’s already known would be patched out.

In this case it seems only a matter of policy that Apple submits CSAM hashes to devices for scanning. No new software needs to be written, no new vulnerability found. There’s no difference between a hash database of CSAM, FBI terrorists photos, or Winnie the Pooh memes. All that’s left is Apple’s words that their policy is capable of standing up to the legal and political pressures of countries it operates in. That seems like a far lower bar.