Part of this is also our culture that somehow decided kids need their own bed, and it's easy to get baby formula.

So the kids are not sleeping in our beds, where they feel 100% secure, getting to the breast whenever they want (and they quickly will want it at a lesser frequency). The woman will feel this, but hardly has to wake up, me... I slept right through all that. Fwiw, we had a bed for the baby that attached to ours.

In our time everybody advised us: Give the bady a load of milk at 23:00 just before you go to bed! We never did, just stuck to about did 20:00, or just when baby cried, both babies took about 2 months to sleep for about 12 hours straight (although soon after the second one developed reflux which had me watch Rick and Morty in its entirety somewhere between 2 and 4 for some time).

Anyway, not saying everybody is that lucky, just saying sometimes it's good to questions things that are given in one's culture. Worst advice imho is "let the baby cry" which was common on our days. How nice to let a baby cry alone in a room, not understanding anything about what happens...

I coslept, but I had shit milk production. Without formula my kid would be dead. My friend breastfeeds, but is an active danger when asleep, so without a crib, she'd have crushed her child.

It turns out that safe sleep rules and the availability of formula exist for a reason. Safe sleep rules exist in the west because pur beds are fundamentally different (and more dangerous) than in places here cosleeping is more common. Tp cosleep you need a certain situation that many people are not prepared to deal with.

There's literally nothing you can do about low supply at all. It's not a matter of trying for me. My body never made more than an ounce even with weeks of attempts. This is even setting aside that some people would like assistance so they can sleep and breastfeeding means dad can't take on night feeds, which is what another friend is experiencing and the child is having a bad time from her severe sleep deprivation.

And even more complications of small child. It's not as simple as "let's go back to the old days". The great days when kids died at much higher rates remember.