My emphasis: 

What I’m saying is that the views on what should be the age of consent go in and out of fashion. When being ‘socially liberal’ is all the rage, people want to lower it. In the era of #MeToo, people want it raised. Clearly, the motivation of those previously calling for lowering the age of consent is very different. One was for public health reasons, but others such as PIE always lurk in the corner and their reasons are purely evil and exploitative. 

 I don't believe I or the writer used the word "current arguments".
The RB scandal has allowed them to trot out the same old same old arguments. 

We see from Afghanistan how freedom from suppression (including arranged child marriages) can be snatched away from women in the blink of a regime change.
We have to resist. There is a large army of men who want all Western countries to revert to something like Afghanistan. 

 

has been another excuse for the Guardianistas to roll out their calls for lowering the age of consent

They’re not rolling out calls for lowering the age of consent. They’re suggesting staggering them, with the same minimum age.