rasha gamur said: “if you go to an institution like YU, you will think that you have as good in ruchniyus and as valid a derech in Torah which isn’t true. “
If a derech in Torah is valid, it’s fully valid; if it’s invalid, it’s fully invalid. I don’t think you should be deciding what’s a valid derech in Torah and what’s not. No one’s telling you to go to YU (chas veshalom), but you have no right to say that the derech that many thousands of frum yidden are following – including talmidei chachamim of astounding proportions – is “invalid.”
And if you’re point was that there is no valid reason to have some form of secular study in a frum lifestyle, and any derech which espouses such an approach is “invalid,” then you’re not even worth arguing with.