My theory about alt text showing as correlated to higher ranking is that it's a result of people optimizing their pages. SEOs have been saying to add alt text

My theory about alt text showing as correlated to higher ranking is that it's a result of people optimizing their pages. SEOs have been saying to add alt text for a while, and it's easy to do compared to changing URLs or a domain name. It's hard to prove whether it's a cause or an effect, but my gut feeling is it's an effect.