The primary active principle in garlic is not the stench, but a powerful antioxidant called allicin, which has many uses, including therapy, prevention and aging.
If we have learned first-aid anyway, doesn’t it make sense to use those skills to take care of the injured, while waiting for the professionals to get there?
A massive solar flare hitting us directly would have the exact-same effect as an EMP attack from North Korea, Russia or whatever “axis of the evil” by the way.