If it isn't ridiculously expensive and inefficient, it doesn't really fit the definition of a triple-a game, because it specifically is the term for games with the highest production values and costs.

Don't forget marketing: be it movies or games, marketing likes to cost as much as the production of the media itself.

Sadly it seems to be necessary as many people just won't know about some piece of media without it. Streamers play games they are paid to play, "reviewers" cover games they are paid to cover or know about through the hype generated by ads.