Oh.My.God. on my list of things I'd never really looked into, but "guessed" they were bunk, i had AP. Now that i've read about it, frome their own damn website, for that matter... WHAT FUCKING BUNK. No wonder feminists talk about it being an impossible measure of motherhood and women doomed to failure. It's an entire world where nothing but baby and child come first, and you and anything else you could want or need come well down the line. "do not let baby cry if at all possible. be mindful of him, so you notice his distress at is begins, before it culminates into actual distress". "do not let the child have prolonged crying, for it alters the chemistry of the brain and can cause future mental issues". "let the child decide to stop breast feeding (they mean age, not in the moment), removing food is removing love and is confusing for the child." "let the child decide when he or she wants their own room". and on and on.
Parenting "advice" is one of those genres of bullshit that's self-perpetuating because it's the kind of thing most people have to do but is in practice extremely difficult to study scientifically. Typically, you just run a shitload of tests on a shitload of data until you get a spurious correlation, which you are guaranteed to get doing this sort of thing, then you've got your p<0.05 and you're ready to publish!
Surely, if you've survived long enough to have children and care about their upbringing enough to look for advice on how to do it properly, you've turned out fine. So therefore just copy what your own parents did and let natural selection figure out the best method.