When kids are young, I have heard so many parents defending certain parenting theories and rubbishing others. And some parents swearing blind a certain parenting theory saved them.
I don't think there is one parenting theory that works for every parent or baby. Different ones work for different people. And I include in that "trust your own instincts".
I wish we could all just accept that what works for me, may not work for you and vice versa. Because every parent and child is different. If a certain parenting theory works for you, then brilliant.