Referenced media entities without alt

Smartsheet wrote a drush script I wanted to contribute back and catch said I perhaps should ask the respected module maintainers here whether they would like to adapt this piece of code.

https://gist.github.com/chx/653787bc7b92fc1e11b58b242c783114

If yes, I am willing to extend it so field_media_image is not hardwired, we would just need to iterate over the relevant media types.