Pretty much. Pretty much anything mainline films wants to do with CGI already has dedicated tools and programs developed and the artists are trained or experienced with them. Cost is mostly from the licensing to use the software, how many man-hours put in by the artists, and the cost of running the rendering machines for the final cut.
I also have a theory that movies use so much CGI to advertise within the film making industry the software used and the artists technical skills for upcoming movies. I am willing to bet part of the licensing and contracts means there must be a certain amount of screentime of their product.