>Love is not a quantity linearly dependent on the contact hours I spend with them. Having other people involved in their upbringing does not mean they receive less love.

OK, I don't know what that means. What I do know is that if you're dropping them off to be raised by people that don't care about them nearly as much as you do, and who aren't going to miss them very much if they never see them again, they're not going to get the kind of love that they get from you during those hours. The longer those hours are, the longer they go without getting that kind of love, and the more they become convinced they aren't worth the full attention of a person that loves them. I don't think that's good for them.

>Mandatory day-care is in Sweden [1] (not my country), because interaction with other kids is good for them.

From your link, it looks like this affects children of age 6. When people in the US talk about day care or child care services, they're taking about children up until the age of 5 at most, and usually actually just up until the age of 3. For children aged 3 and 4 it's usually called pre-school rather than day care or child care service.

In the US, children at the age of 6 are entering their second year of school, which if they attend a public school is free from kindergarten (age 5) to the end of high school (age 18). This article is about the expense of child care in the US. The law you've linked is entirely inapplicable to this discussion.