Succession planning.

This appears to be Larry Ellison trying to manage succession for his kids. We'll probably see a second major acquisition like this for Megan (who tends to be more progressive leaning) [edit: I was right. Megan Ellison is making moves as well now [0]]

Larry would not be able to do something similar at Oracle today (definitely in the 2000s though), as by the 2010s operational control at Oracle increasingly shifted to operators like Catz, Hurd, and Kurian. It also would have led to bad blood à la the Murdochs.

One heir cultivating the right wing (David) and the other heir cultivating the progressive wing (Megan) buys a level of political impunity for the next generation that is hard to come by.

[0] - https://www.hollywoodreporter.com/movies/movie-news/megan-el...