@oyveyismear you can see the practical results in the different methods of chinuch (ie immersing youth in secular culture vs. giving them the highest standards of purity and kedusha possible.)
If anything, the proof is on you, the toien, to provide on how you see this approach, which had produced better results, is wrong.
As far as seeing an outright source in Torah is what I quoted about the tree sufficient? Or more stronger Torah thought? As I said I have some time now I’ll gladly write it up.