DY, what does it have to do with MY opinion?????
We are talking about why kids go off the derech. The parents bring the child to the yeshivah that would be best for the child. The school rejects them out of hand because they are so insecure and have not taught their talmidim why they do what they do. They have NOT taught them why they follow the rules they follow. They have NOT taught their talmidim how to answer questions if asked. So they are afraid that taking a child from a little bit outside of their own community can cause such havoc.
The parents are doing the right thing trying to get their child into the yeshiva they think is best for them. What more should they do? Should they lie and put on masks when they go for the interview like so many others do? Should they pretend to be someone they are not, like so many others do? Is it the livush that makes the person?
On the other hand the yeshiva can say, “when you come to the school whether to pick up your child, or for meetings or functions you will be expected to dress according to the rules just like your child. And for the mother “and cover your hair properly”. If the parents agree there should be no problem with it.