We just had a baby boy and I'm not going to lie, stuff like this has me worried. We were already considering home schooling (we split time between multiple countries and that's not conducive to a normal school schedule) but this is also a good argument for it.
I'd hate for biases in institutional schooling to lead him to hate school and potentially lead to poor life outcomes.
And now that I think about it, there was a massive spread between the grades I was given by teachers and my standardized test results (talking like 30 point difference).