My wife worked in several daycares in her early 20s, including an extremely expensive "Bright Horizons" location in a very affluent area. Even premium daycares provide inferior care to infants and young toddlers versus parental/family care. The economics of a business being in charge of your child demand this. Something that shocked her was at this super expensive daycare she worked at, the infants were basically given the bare minimum of attention while the older children consumed all of the time from the staff. The focus was on parental retention, so her job was to focus on changing the diapers of the infants to prevent diaper rash, and this took precedence over actually holding them and interacting with them. At no point is it remotely similar to how homo sapien mothers parent their OWN infants.

Daycare is to parenting as processed food is to nutrition. They are modern developments that prioritize economics over quality.

A study done in Canada (a "natural experiment", where a lottery determined eligibility for free daycare and allocated it at random) allowed researchers to track children who were enrolled in daycare versus children who were parented by their mothers, found that (adjusted for income) the infants who lost out on the lottery and were raised by their mothers in early childhood were healthier and better adjusted adults years later.

I am not arguing that parents should be deprived of paid parental leave until they are ready to go to preschool/daycare. I sm arguing that once the child is old enough to do that, it shouldn’t have to kneecap family finances to do so.