I thought cruises were basically the same. As long as you got room to breath and aren’t trying to share the deck with a 1000 people.
I’d be inclined to stay in my cabin, in which case I’m as well off enough to stay in a motel with an Ihop across the street.
Go to Youtube and look at the walkthroughs people do of these big ships Symphony of the Seas is almost as big. It is no more crowded than an ordinary shopping area on a Sunday afternoon.
On a bigger ship there are more and bigger decks, on more levels. If you wish to go on a cruise, choose the biggest tonnage and largest crew size. Those bigger ships are so much more stable, no chance of getting sea-sick.