I think the idea of cravings has been distorted. I have 2 DC and both times had full-on Pica. That's the need to eat weird things which aren't really food...also the need to smell certain things.
Mine were ice, smelling flash cleaner with bleach and coal.
THAT is a pregnancy craving. Fancying more Walkers than usual is not a craving.
Neither is a desire to gannet pies and cakes.