Should Tapioca flour really be allowed?

[ThatRobert]

I finished my 30 days on Whole 30 and am in the process of reintroducing food.  Even though Tapioca Flour is officially allowed during the first 30 days, I hadn't tried it until last night, using it as a coating for pan-fried chicken.  I reacted to tapioca flour the same way I react to gluten.

Researching this, it looks like Tapioca "flour" is really just Tapioca Starch and is a heavily processed and bleached food.  That really doesn't fit with the idea of Whole 30.  Cassava flour is a whole flour from the same plant and is not bleached.  That should be OK.