I don't even know what point you are trying to make here. The prices for Apple products also increase higher than the inflation, so are you telling us that Apple is in decline?
If ticket prices rose higher than the inflation and still enough people are willing to pay them so that the 2019 box office was higher than that of 2002 then there is no big problem here. It would only be a problem if the increased cost would lead too many people to abstain from moviegoing but as the all-time record box office 2018 shows that was clearly not the case pre-pandemic.