So right, WE DO NOT PASKEN LIKE THE SIMPLE READING OF THAT RAMBAM. YOU”VE BEEN BRAINWASHED!
Look in Shulchan Aruch Or. Chaim 156:”…because all Torah that is not accompanied by melocha is going to be terminated and bring about an inquity…”. The Chofets Chaim in Biur Halocha says the Sh. Ar. is talking about the general public, but there coulb be some yehidim to whom it does not apply.
Do not pasken from the Rambam without seeng the sugyos and the Achronim.