This reason, while good and noble, feels really wonky. From what i understand, iOS's accessibility has much miles better then Android's accessibility options. If their main motives is to give a better mobile experience to people with special needs, maybe focusing on implementing these improvements system wide changes would be time better spend.
You work hard to make these changes then iOS 7.x.y comes out and the user updates by mistake and loses all the changes a jailbreak gives. It is this constant fighting with the system that has made staying with iOS less appealing these days.