I read about your situation Monday. You've been on my mind and heart. I do hope his Covid symptoms are mild and that you are not sick.
I've seen other accidents happen in other tourist places. I remember a man fell off of the back of a horse drawn carriage, and the driver helped pull him up but made no comment. I think employees are told to not admit fault by saying nothing. It's a legal thing.
Everything you've wanted from the cruise line seems reasonable to me.
I'm sure you are glad to be back in TN. I'm in the Chattanooga area.