Without ranting at length about srs' flaws [...]
But please do! Not for mathematics, but would you disagree that it is an aid for, say, vocabulary memorization in early language learning, when you're trying to bootstrap a reasonable understanding of common vocabulary and idioms? Or the point was more just that applying mass memorization (with the aid of SRS or otherwise) to every discipline is a shit idea in general (but is acceptable in certain specific cases - and, transitively, so is SRS)?