The problem is that homeschooling requires a full paradigm shift. Unless you have limited resources there is a sizable investment of time and money. Many parents, no matter their political bent, are afraid to give up their lifestyle to have at least one parent at home dedicated to teaching the kids. I know it sounds callus, but it is often true that lifestyle wins out. And the kids are OK with that too.
Yes, it takes time and some money. Not a sizeable amount of money though. We did it with only mr. mm working. And there are MANY ways of saving money with mom staying at home.
I guess it depends on how much you think your kids are worth and what’s really important to you.