Uh. Inasumuch as they didn’t keep halacha- yes, they were less frum.
But is that a valid reason to deny their daughters a jewish education?
I wasn’t speaking to that point.
But, since you raise it. Let’s discuss it.
If you want to, you will first need to acknowledge the reasons the people who do this are raising. You can’t ask as if anybody thinks that having a parent who doesn’t keep halacha is a positive reason to not give a child a jewish education. Once you acknowledge what is actually happening, then we can discuss its merits.