The shailoh was paskened centuries ago. The radvas on the rambam says that if we paskened like him, כבר נשתכחה תורב מישראל ח”ו
The nosei keilim don’t bring it. Shu”a doesn’t say it. The achronim almost all say that in their time there isn’t even a middah tovah to not taking tzedaka to learn.
Let it go. We don’t hold of 1/3 or so of the rambam’s own shitos – why do people harp on this so much?
Rav Moshe writes that it’s gaavah to want to follow that shitoh nowadays.