It's not come from Attachment Parenting, I did AP, there was no golden rule about avoiding all crying EVER. Yes there was some judgement about sleep training or ideas about "not holding the baby too much" etc but in general, no, this isn't what AP is about.
It's come from the weird polarisation of social media/internet parenting advice, making everything into an extreme "us vs them" issue, backed up with dubious "science" so that you end up with ridiculous, black-and-white, overly-detailed standards which nobody could possibly fit into, and the threat of dire consequences to your baby if you don't, which only seems to serve to fuel new parents' anxiety and sense of isolation.
It's absolute madness - I thought it was bad when my eldest was tiny (2008) but then it seemed to calm down a bit - then over the last 10 years or so it's been ramping up and up and up until people feel like (whichever side they've fallen on) is somehow "the official advice".
It's not. It's never been! If you look at advice from sources like NHS, lullaby trust etc it's much more balanced and really not very prescriptive at all. This is because if you're writing official advice in a professional capacity, there are guidelines and training to do this, you have to consider not only what exactly are you saying and how it might be interpreted directly, but also consider what people are going to read between the lines, what unintended consequences will there be from this advice? And realistically there is a HUGE gulf between "ideal" parenting and "harm". Randoms on FB on a power trip don't have any of that in mind and seem to revel in creating ever more extreme or ever more complicated rules and then berating anyone who expresses any kind of dissent.
What's the cure for it? Get off the internet, make mum contacts IRL. Such a sanity saver to see that people can exist quite happily and safely in that gap between ideal and harm. Good enough parenting is good enough. And social support is probably what you're looking for by searching all the groups/pages/forums anyway.