The same could be said of Turn 10, that studio has talent, a lot of resources and only ever makes Forza Motorsport, yet a lot of people would say they're happy making that game, you could argue that the same is probably true of Polyphony Digital.
343i has always made Halo, taking the reigns from Bungy, they didn't even invent that game, yet they're basically making only that for their entire career.
I wouldn't be shocked if these studios have internal divisions making new ideas for new games and their ideas just don't go anywhere beyond the games they're known for publicly.
Any long-term studios that have been a part of a major platform holder and proven themselves to be worth their salt should get a chance to make something new, especially after a decade or more working on the same game franchise.
Static shit like sports and racing makes complete sense to have a team dedicated to that. So teams like PD and T10 make complete sense that they just make stuff like that as its hard enough as it is to be having the team randomly making new IPs or something. Having a team do many new IPs is more easier with progressive concepts vs static ones.