"Why now" I think is pretty obvious -- the age limitations that exist currently are easily circumvented, but have given enough of a plausible deniability aspect that politicians have been able to skate by. There has been increasing research and media dedicated to the idea that there are aspects of the internet which we should be shielding children from. While many of this research is dubious, there's a rising moral panic around it.
The core of the problem is that there is no possible implementation of age verification that does not also require identity verification. In this I am in strong agreement with the article, but the use of paranoid and dramatic language as in this article only alienates people who find the conspiratorial tone to be reverse polarizing.