I'd say this advice doesn't really go far enough. I'm not a scientist but I have read a number of these studies and the biggest takeaway is that in many cases effect sizes are really low and it's hard to say whether these effects are real or the result of some hidden uncontrolled variable. This applies, at a minimum, to breastfeeding v. formula, and also to alcohol consumption during pregnancy. Back to sleep has real and significant effects. Screen time's harm is severely overhyped given the quality of the evidence we have available, but too much sugar is definitely bad for you.
My advice to new parents is basically that in most cases we don't have good evidence for one thing being much better than another. As far as food, baby should have formula or breast milk, but which one doesn't matter all that much. As far as sleeping, the sleep area should be firm and free of blankets, but as far as I'm concerned the evidence about where baby should sleep is minimal. I'm not aware of any strong evidence that sleep training has an effect other than teaching the baby to sleep.
One other commonality I see in a lot of this stuff is there is zero consideration for the costs that the various treatments impose on parents, and particularly on the mother. If breastfeeding gives junior a 0.5% increase in IQ, is that worth a year of suffering and untold hours spent feeding? That's a value judgment, for sure, but it seems to be left out of the equation entirely when people are giving advice to mothers.