Lucasarts owns the ip so therefore it is Disneys decision. I did see this morning on the PlayStation blogDisney had nothing to do with this decision.
Regardless, it's already been confirmed that is a timed exclusive. It will launch on PlayStation and PC, then Xbox later.
"And it’s a console exclusive on PlayStation 5 at launch."
I still think they are hindering sales by not just going all platforms right off the bat.