Your reply to me failed to address any of my substantive points.
But you did throw in the angle of non-learning Chareidim, which your OP didn’t inquire about and therefore wasn’t previously addressed.
There are many reasons even non-working Chareidim cannot and should not join the Zionist Army. Some of those reasons include such soldiers, when discharged, are no longer the same Ehrlich Yid he was when he went in. Another is the rampant pritzus in that army.