how can anyone make broad generalizations is beyond me. for one, a family might decide that child care is not the right option for them, so be it. but its not fair or right to say its not an option for anyone in the world.
quality versus quantity of time is what matters. and for all among us who feel that mom's best sacrifice is her sacrifice of her career, good for you that you can afford to do that. others may not. so dont crucify them with moral weight of righteousness because no one has proprietorship on raising great children.