Everything in AI is built on copyright infringement, so redistributing Blizzard assets while slapping an MIT license on everything is par for the course.
It has been 24 years since release, in any place that isn't completely captured by big capital interests it would be fair use. This is such a forced reach. There are plenty of good arguments to be made re: big LLM providers and copyright, yet you're weakening all of them by choosing the worst example.
Fair use doesn't mean you can placate any license you want on it.