Bear in mind that "return to port" means the Bahamas, not the US (presuming that one is a US resident.

In the event that one contracts C-19, at best you wind up in the Bahamas and not back at a US hospital. Before booking, I would want to see the specific arrangements which have been made with the Bahamian government in the event that there are positive cases.

Lastly, also need to consider that there will need to be some testing scheme onboard as the US will require a negative test to enter (unless one is spending post-cruise time in the Bahamas).