Sorry, rant incoming.
Self settling is something humans all do when we wake. Some adults flip a pillow, some have a stretch, some cuddle their partner - then back to sleep. Some kids roll over, pop a dummy in, cuddle a teddy and drift off back to sleep.
Why does she think it's a bad thing? Best thing I ever did for my two was practice 'le pause' (wanky term I know) but giving them a couple minutes when they woke in the cot to see if they put themselves back to sleep before rushing in to help. It is not damaging, I never withheld comfort and I for sure didn't dump them at nursery 10+hrs a day while I got my hair done, cleared out my wardrobe and filmed Instagram reels. This is a way in which some (not all!) babies and children learn to connect sleep cycles, why does she think it's so evil? Sleep training as a blanket term encompasses extinction method and ferber, which studies have proven raise cortisol etc and can be damaging but not all sleep routines, specialists/coaching and sleep techniques are evil?
Sorry she really pissed me off with this because my kids didn't sleep till toddler hood and with a partner that worked long hours - we tried to implement routine to help us all get some rest and that does NOT mean I don't have good attachment with my kids. She's so bleeping annoying and needs to get off her high horse about this.
She thinks because she sleeps with a tit out all night that she is some kind of attachment parenting ambassador.
Also - some of us couldn't BF and grieved over it, so duck off with that angle too Ash you nasty cow.