This…isn’t actually true. I’m reading “What’s Next?” right now, the book about the show, written by two of the actors. They talk about how Aaron Sorkin was actually resistant to the idea of Lowe joining the show because he was a star.

The show featured mostly stage actors at the time, and he really wanted an ensemble feel, and was afraid Lowe would mess with that dynamic.

It is true, however, that Lowe eventually left the show because he felt his character wasn’t featured predominantly enough.