A person who cannot stand the sight of blood might want to consider becoming a lawyer rather than a surgeon.
By the same token a person who gets sea sick might consider becoming a teacher rather than a sailor.
Therefore why would someone who suffers from air sickness want to become a pilot?
There is something rather illogical there and furthermore he wants to become a COMBAT pilot pulling 5 - 6 g etc and perform serious combat aerobatics mmmmh??