If If If. This isn't blind pessimism. This is from someone that has dealt with metadata from studios/labels for just under two decades. IMDB was meant to do this for movies/tv, but yet it's an absolute dumpster fire.
So from an outside perspective, it's fun to dream a little dream, but from a gray beard it's just yet another dream.
If those two open access sources become big enough, it is quite clear that someone will make a project to reconcile the data between them.
If any of those projects skyrockets the same way wikipedia skyrocketed, then the topic will be solved.