Yes, that's exactly it. There are
innumerable reasons why stories are retold. Which is exactly why it doesn't make sense to single out just one of those reasons and say it's invalid. Retelling stories is a fundamental, universal part of creativity. It always has been and always will be. It is not unoriginal or creatively bankrupt. It's just part of the process by which stories are kept alive and dynamic. Even if there is a mercenary or commercial motive to remaking intellectual property, that won't matter to the people decades or centuries from now who are still enjoying the myths and legends we set in motion today. The stories that will be remembered into the far future will be those that get retold and reinvented for new generations and new audiences, regardless of the reason why it was done. It's the retelling that turns a mere story into a myth, into an archetype.