I grew up secular and attended public school.

I think the misappropriation of public funds by ultra orthodox Jews is committing an institutional disservice to the students. I haven't seen an ultra orthodox private school deliver a secular education that I would consider baseline for what the students need in society.

The reason they do this is to improve the chances that the students will stay within the faith, marry within the faith, and raise children within the faith. It's prioritization of multi generational survival vs this generation's needs to be successful professionally.