Why does Safe use the Botan crypto library? Botan has a single contributor who says "[Botan] has never undergone an impartial third-party security review, and

Why does Safe use the Botan crypto library? Botan has a single contributor who says "[Botan] has never undergone an impartial third-party security review, and thus it is entirely possible/probable that a number of exploitable flaws remain in the source." I don't know of any other project that depends on it.