> Outside the home childcare is not 24/7.

No, but it is during our most productive, aware, and valuable daylight hours.

> Also, it's really weird to be making this argument for mothers and not fathers.

In the context of human history, it’s not weird at all.

> Having childcare available gives the opportunity for both parents to spend more quality time with their children.

How?

It reduces the time children spend with a parent, and it creates a world in which both parents have to work just to afford having children.

I suppose in the context of human history, you might argue to enslave a population based on racial characteristics in order to provide childcare.

For many families, both parents have to work. Most time spent not working or sleeping is spent doing a task simultaneously with childcare. Cleaning, preparing meals, repairing things, laundry, etc. Even for families where one individual shoulders the bulk of the burden this is largely the case.