I wouldn't be concerned about that, the mathematical models make assumptions that don't hold in the real world. There's still plenty of guidance in the loop from things such as humans up/downvoting, and people generating several to many pictures before selecting the best one to post. There's also as you say lots of places with strong human curation, such as wikipedia or official documentation for various tools. There's also the option of running better models as the tech progresses against old datasets.