Eli Y it doesn’t have to be all or nothing. A school or chinuch institution has to set standards or the majority suffer to benefit the minority. If it is a case of majority vs minority, the good of the majority wins.
However you as a parent have the privilege and responsibility to develop your child into the best individual Jew possible. You have The power to do so as Hashem granted you your child and your abilities are a perfect fit for him.
You can set up your own personal program for him that you reward him for learning something extra outside of school. If he sees this is important to you and will make you more proud than doing well in sports he will go for it.
My parent had such an learning program for me and my siblings, and we learned and gained so much from it. (Shame I can’t specify further as it would give me away, as we gained things very unique within today’s generation.) You can even do this with the yahadus books themselves.