If you want to launch a video game division, you need to establish offices, secure executives with the right expertise and a compatible vision, hire experienced producers and designers, fill out the team with talented people, develop a toolchain, build prototypes, do playtesting, and come up with a coherent vision for your product. If you’re starting from zero, then that process can take months. That’s not the time it takes to make the game, that’s just what’s needed to get to the point where you can begin development. Even then, very few new studios manage a smash hit on their first try.
Rather than wait for years to spin up their own studios, Disney handed the license off to a major publisher. Sadly, they choose EA.