I went down this road with a few of them before, noting how laws to protect children have actually increased, even in the midst of and post "sexual revolution" of the do what you will 60s. One reason is because we now understand that the ability to consent, which was historically relegated to the experiential want in the young, is now augmented by an understanding that they are biologically impaired, that their prefrontal cortex, the rational seat of judgment, won't be fully functioning until their early 20s and that early teens are significantly impaired in that respect.Well, no, it hasn't been "dismantled" by anyone as the 'slippery slope' fallacy has no credence to it to begin with.
You really would have to have several screws loose or be an abject moron to think that pedophilia would be accepted in society or that laws would change to legalize it.
To alter or rid ourselves of consent would be, as I've set out in some detail prior, to undo much of broader law that governs commerce and criminality. And even if science and morality fail to motivate the movers and shakers of a compact, money always will. It's neither reasonable nor rational to advance the notion of that happening for all sorts of reasons boiling down to the most fundamental one of all: self interest.