She defended Elon during some conference she was with him on stage. And she's done ad strategy at NBCU. It's that simple.
Elon needs someone sucking up to him, and who can attract more ads. He has a 3 billion hole to fill.
She'll fail.
Her deep involvement in the WEF (multiple roles, one as head of a WEF "Future of Work" project and another as a member of a media/entertainment/etc. WEF steering committee) is starkly at odds with Elon's own recent rhetoric against globalism, ESG, etc.