I'm sure there's two sides to the story, but it looks like we'll never know. It appears this was just a one-time 'drive by' post to complain about something.
I do know that the multi-use facilities on all ships, like the basketball courts, are changed over at different times to accommodate different activities, such as volleyball, tennis, etc. In fact, for a while, NCL was spending a great deal of time and money to turn theirs over for a few hours every day to be used as an outdoor ice skating rink. Took them quite a while to lay out the special flooring and no one was using it, so they stopped the practice.