What you and u/SgtPepper29 are missing is that vaccines aren't labeled as treatments or "curatives" - i.e. they aren't things you treat someone with after they've fallen ill, as Ivermectin and Hydroxychloroquine are (see: picture). Any physician in the world can explain you that.

Instead, vaccines fall under the label of prophylactic - i.e. they prevent or lessen the effects of a future infection. There are very few exceptions and edge cases (when a vaccine is a treatment rather than a prophylatic) such as some specific cancers.