But no. In fact, Benghabrit specifically frames teaching in Darja as "a solution... for teaching standard Arabic to our children" and calls for "a national debate on the best way to teach Arabic and the main languages[?] to our children", while emphasising the problem of children failing Arabic. She notes that "if a child does not master Arabic, he cannot master the other subjects which are taught in Arabic, notably essential subjects such as mathematics", without so much as musing on whether maybe we should try to separate the problem of learning mathematics - especially in first grade! - from the problem of learning grammar.
Focusing specifically on Arabic teaching immediately begs the question asked by many critics: if it's more effective to teach Standard Arabic using the students' first language, why does that not also apply to French and English? French is introduced in 3rd grade, and her proposal stops at 2nd. Practically every Algerian I've ever met assumes - rightly or wrongly - that monolingual language teaching is more effective, or indeed that it's only way to teach a language. In such a context, Benghabrit's emphasis on using Darja to teach Standard Arabic can hardly fail to be seen as an attempt to handicap students' acquisition of Standard Arabic while leaving their acquisition of French intact. Her supporters in the Algerian press do little to dispel this assumption; the ones I've seen either don't address the question of its effect on Arabic teaching or are openly hostile to Arabic. That interpretation goes a long way towards explaining the violence of the public reaction against her proposal, disingenuous though it may be.
Even if Benghabrit had had the sense to frame this proposal around non-language subjects instead of around Arabic, actions speak louder than words. When someone obviously well-connected and well-educated, and presumed to be rich, comes and tells Algerians that mother tongue education helps children learn better, the question on people's minds is obvious: Did you demand it for your own children, or your nephews, or your grandchildren? If Benghabrit did, she hasn't mentioned it. Certainly no one else in the government did: we see the rich and powerful seeking out private schools in French, not looking for ones that teach in Darja. No wonder Algerians aren't buying it.