I just want one person to prove to me how knowing Math and being literate in English (The Lingua-Franca of the world, the lanugage of commerce ) damages the Torah.
A challenge!
The answer is very Pashut, IMHO. The Gedolim are very much aware that the average Charaidi is unequipped for contact with the outside world (as they follow the Rav Dessler Mehalech in Chinuch, as I have posted elsewhere). As such, preventing any such contact is a priority. Not learning math or english prevents the aforementioned Charaidi from going out in the world and getting a job, and as the main (not side) point, prevents him from having contact with the outside world.
Math and English is not the point at all.