It was originally designed for use as such.
Can you build something that big and fast for the cost of refurbishing?
If we need troopships that can work as superliners between wars we would be better off building new ones with up to date electrical systems, high efficiency diesel engines, and better maneuverability inshore. Also pools on the upper decks can be drained and covered over with a thin structure to form landing pads as was done with Canberra and QE1 in the Falklands. SS United States had her pool deep inside and her deck is too cluttered to quickly add a helicopter port. Not a big issue in the early 50’s, a deal breaker now.