[Captain Ahab Jr]

I think Checo and Bottas are an inspired choice as Cadillac have no previous car, historical performance data, their drivers both have recently driven for two different top teams so both will know what a fast F1 car should drive like

Any driver from Indy won't have any idea what a good F1 car is like to drive so wouldn't be able to get quickly up to speed to guide the team in the right direction

While Cadillac have a Ferrari PU the team will just be harvesting data to prepare them for when the GM PU is used