Softwords: That was a strong rant that was both irrelevant and misguided. To start, I find it unlikely that you would claim R’ Kook and R’ Soloveitchik as “Chareidim” in any other context, whatever that means. Similarly, there was no distinction between “Chareidi” and “Dati L’umi” in the time of the Netziv so going back that far gains you nothing.
Secondly, nowhere did he claim that no one should learn. He didn’t say that we need to stop Torah. He said that people should spend a few months-years in the army. That isn’t stopping Torah. That’s having a (small) part of your life that stops you from being able to learn.
And your claim that “Bnei Torah” (which is quite an insulting term used in contrast to his son) “put their lives on the line” is false and foolish. Who says they get anything for choosing to be destitute? Who says such a thing is even Muttar? If I suddenly decided to eat only 200 calories a day, that wouldn’t make me a Tzaddik. It would make me anorexic. So your claim that they are sacrificing their lives for Yiddishkeit isn’t Muchrach at all. They are sacrificing something, certainly. But the burden of proof that it is for the sake of the continuation of Yiddishkeit is on you.