Also not every parent is qualified to homeschool their children.
So what choice is there?
My first wife (home with the Lord since 2004) homeschooled with a GED and a determination to keep her children from the devil's influence.
We invested in a lot of ink and paper and Debbie was a school ma'rm !
She found her "group" on the net and about 8 or 10 like minded ladies shared with each other the successes and failures and got their kids through school
Debbie went home with one graduated and two with about 5 years left to go.
You've repaired your car and your refrigerator using youtube.
You've researched nuclear technology and international politics ...
All in your own home and your underwear.
THERE'S NOT A MAMA ON THE PLANET THAT IS NOT QUALIFIED TO TEACH THEIR OWN KIDS !
Look into your local schools .... THEY'RE using the internet for EVERYTHING and buying programs from programming vendors.
I strongly suspect most are better qualified than the default public school teachers.
As to affordability, charter schools offer the curriculum materials for "free" (taxpayer pays), so if one can't afford private or parochial brick and mortars, there's that option, and it calls for minimal time and energy from the parents.
There are always excuses for avoiding low priorities, and the minds of their children are low priority for many parents. High priorities include the second income which goes to pay for other high priority things like the house and cars they can't otherwise afford.
It's tough enough to live beyond your means even with the government babysitting for which you trade off your children's minds. But something or someone must be sacrificed, so the kids and their future have to step up.