You are underestimating the value of the Fox content.

Streaming has become an important source of revenue.

This is a list the ten most streamed shows in the US about a month ago:

The Watcher; The School for Good and Evil; House Of The Dragon; The Sinner; The Blacklist; NCIS; Gilmore Girls; Love Is Blind; Unsolved Mysteries

(Nine of these shows are on Netflix, one is on HBO)

That's right, Gilmore Girls outperformed anything that's on Disney+ or on Amazon.

And Gilmore Girls wasn't a big hit when it originally aired.

Disney needed content and Fox has a massive library.