Fucking hell, voluntarily running scans on your computers for CSAM? Are you going to voluntarily get a brain wave scan for whether you have anti-patriotic thoughts?
The choice isn't between scans and no scan. It's between voluntary scans (which can be white box and controlled) and involuntary scans (which are black box and totally uncontrolled).
That's silly; voluntary scans aren't voluntary if they're to work, and no scans is always an option. Human decisions to do things one way or another have never been set in stone.
No, the choice is indeed between scans and no scans.