> Seems weird that the author continued sending their kid to the school...
Unless you're rich, school choice in the US is often not a thing. It's not really practical to sell your house and move to another district over something like this, and uprooting your kid like that has its own downsides.
> Given the prestige of the school, I have to assume this person has some serious money.
I don't think that follows. It's quite possible they have the money to buy a house in a "good" school district, but not the disposable income for private elementary school (even assuming there's a private school available and it's equivalent or better).
Unless you're rich, school choice in the US is often not a thing. It's not really practical to sell your house and move to another district over something like this, and uprooting your kid like that has its own downsides.