AI depictions of children do not pass the current SCOTUS standards, all we need to do is actually utilize the laws currently. The bill would have been infinitely better providing state and local authorities more investigative capability to find and summarily execute pedophiles generating images of both pseudo-real and explicitly real children. Literally just do that and the lolicon/pornography retards shitting up the internet will be cut in half.
EDIT: Quick note on the obscenity angle, I have no fucking clue how that's going to go down. Most courts don't even want to bother, including SCOTUS, since it's basically the legal and ethical purgatory of 1st Amendment rights. This is always the issue presented in the U.S., we're a country based off of natural rights, not authority-given rights, but finding where those rights intersect with social decency is so extensively difficult the courts have basically given up.