https://gamefaqs.gamespot.com/a/forum/2/23a2c8f8.jpg
So this is 100% a self-serving move, which is perfectly on brand for the man. When he speaks of division, he isn't talking about America, he's talking about his fan base. The racist rightwing Rock fans don't like Biden and the woke leftwing Rock fans don't like Trump, so he won't endorse either. Becoming a billionaire is more important to him than using his platform to make the country a better place.