Meanwhile 99% of innocent people will be hugely inconvenienced by weakened security, not to mention the amount of suffering caused by data breaches and impersonation, then the loss of jobs and economy for many business wasting resources on downgrading their products for compliance.
Not a great trade IMO.
It is more likely that "only pervs use encryption" is a pretext to appease lazy police or spooks, who just want to hit buttons and get people arrested. I have this suspicion because actually helping children who are exploitable this way is a much more difficult problem than breaking out the banhammer.
The perception of those people also has to change. I would guess most of them will not have made a conscious choice to be attracted to children in the same way that most homosexuals will not have decided to be attracted to the same sex. So they have to deal with a desire that they can never fulfill without doing something really bad and many of them would probably benefit from professional help. But thinking about those people as if they are the personified evil and considering them almost inhuman, is probably not what will encourage them to come forward and seek help.
Also, sometimes the most strident voices of condemnation are seeking to draw attention away from their own criminality. A couple of months ago a guy in Southern California was arrested and charged with not just possession but production of CP and other sexual offenses. He had a private room on his business premises that he used for these crimes. In 2021, he had hosted an anti-child-sex-trafficking rally in the parking lot of the same business location.
Likewise, think of the numerous cases of moral crusaders against fornication/ homosexuality/ whatever that turn out to have been engaged in the same behavior that they regularly denounce. Dishonest people see no problem with being a pastor or community leader and bilking the suckers foolish enough to donate to them.
Anyway, my point was that some of the most strident condemnation is actually performative & deceptive.
Another example literally just popped up in my news feed: https://www.wusa9.com/article/news/local/maryland/library-va...
Also the decision is not a dichotomy between complete surveillance of all communication and doing nothing at all, there are other measures that can be taken additionally or alternatively. So the proper measure is the additional utility of banning end-to-end encryption over all the other things you can reasonably do, not over not doing anything at all.
The problem is that from a security perspective, it sort of is all or nothing.