It's all nonsense and ig is full of charlatans running poxy courses/workshops/webinars on how to have stepford babies and stepford lives. Saw one once for helping your child start preschool 🫠🫠🫠 Here's a little tip: it's messy, it's hard and children are not robots. You may get lucky and have a good eater/sleeper etc. You may have a colicky or reflux baby. You may have a baby who won't sleep, won't eat, won't talk/walk when they 'should'. Just do your best and take help from actual professionals when needed and not mary from ig who did a 5 week course, a subscription to canva and now calls herself an expert.
I get that when sleep deprived, people are not at their best, but it's not going to help throwing money at this greedy charlatan.