The diversity argument does ring slightly hollow when iirc Boeing has only made two Starliners and it only has enough rockets for the 6 missions in the contract.
Basically they're set up to have one capsule in refurb while the other is at the station, and once the 6 Atlas V's are spent, someone has to cough up the money to do the stack of paperwork for crew rating the combo of Starliner and Vulcan.
Basically they're set up to have one capsule in refurb while the other is at the station, and once the 6 Atlas V's are spent, someone has to cough up the money to do the stack of paperwork for crew rating the combo of Starliner and Vulcan.