EFF would probably argue that technologies like safe browsing are also a shift away from E2E encryption. They were strongly against email spam protection in the 90s for this reason.
Now we all accept it as annoying but necessary?
My guess is this may meet a similar fate.
In particular, you can be concerned about E2E encryption being compromised while still believing parents should have some transparency over whether their kids are receiving explicit images. Not clear EFF offers a solution that meets both, but I did not say they are opposed to the latter.