Atash mentioned "granny daycare" as being discouraged because they want all transactions to be public and commercial.
There is another reason too. They want the kids institutionalized as early as possible.
Good observation. That's how they program us to have a livestock mentality.
Here in NY, they are now starting (full-day) kindergarten at 4 (the year when they will turn 5, even though by law they don't have to attend until the year they will turn 6). And they offer free public pre-k the year prior.
That trend has been going on for a while. They use crack-baby poster-children to make the case, but it impacts all of us, even if you don't take them up on their "free" service, you still pay for it, and it also creates the "creche-baby" mentality, that makes the rest of us look like nonconformist weirdos for wanting to raise our children a bit more naturally.
We put up with the dreaded stigma of "homeschooling" for decades. Now I am not looking forward to starting over, especially as the hysteria seems to be rising not falling. No wonder so many homeschoolers live out in the sticks. But you really can't hide.
I would guess my current neighborhood would be more hostile to homeschooling than the last. A lot of the neighbors don't like us anyway, and the "culture" here is different--a lot of highly indoctrinated busybodies here.
For those who are not aware, "school" creates an extremely un-natural environment where:
* children are age-segregated. It creates a self-reinforcing group age-norm, that stunts their maturity. In real life in the "ancestral village", there are older and younger kids around, not to mention adults who are related to you and take a personal interest in you (the day-care staff don't).
* activities (such as they are) encourage intellectual passivity. You get approval for being quiet, and staring at the teacher and pretending that you're listening.
* You almost could not design the instruction any worse. The right order in which to do things is to have the kids read the lesson themselves first, try to do the homework problems, and then talk about the lesson in class the next day. It also makes more sense to start with generalities, and flesh out the details later. Instead, the teachers lecture class one day and have the kids do unrelated "application and integration" homework at night (Benjamin Bloom's idea) hours after they have forgotten the lesson they weren't really all that involved in in the first place. This is essentially perfectly backwards from the way our brains work.
Bloom by the way was a card-carrying commie, doing research on how to train the livestock to be livestock.