If it is possible for me to lose an ability – if only for a time – then it also remains possible for someone else to have neither gained nor ever gain that same ability.
You and I are human and therefore governed by the same universal rules, both intrinsically and externally, thus, the possibility exists that you also can lose an ability which I have never, and may not ever, receive.
Whatever the gift – whether in personality, physical ability, raw intellect, or God-given faith (including gifts of the spirit) – if any one of us can lose a gift, it is possible then, and likely, that someone else does not possess that same gift, or at the very least the same measure of it.
We need to be careful about what judgments we entertain against our fellow human brothers and sisters, whether openly or in secret, just because they don’t share our same abilities. We each were born with a purpose, and, with that purpose, certain abilities turn on and off according to when we need them and when we do not. If you lack wisdom to form a sound judgment, don’t judge. Instead, ask for the wisdom to first understand that upon which you are about to pronounce a verdict. And above all, ask God for the wisdom to discern your lack of it.