Obviously, while such tech isn't readily available, we should be manually adding alt text as much as possible, but I don't think we'll ever get everyone on board, and this is the long-term solution.
One example I think about a lot is speech-to-text, which was an early consumer use case for machine learning, even if people didn't really understand it was "AI."
In the early 10s, it got so much wrong it felt barely worth using. Now, it rarely messes up and works amazingly!