It seems to me that this is the standard Yeshivish viewpoint, learn as much as you can. If you can’t learn anymore, then choose a kosher derech outside of learning.
The Israeli Charaidim never accepted that view. That is one of the biggest differences between CHUL Yeshivish and Israeli Charaidi.
Another difference, as american_yerushalmi and ubiquitin both point out, is whether “Da’as Torah” means that the Gadol has the only and final say, and no one has the right to an opinion or even respectfully offer comment. Charaidim adopted the Chassidish view that the Rebbe’s word is final, always correct by definition, and no discussion is allowed, while the Yeshivish have adopted the Litvish view.