Pro SEO Question: SEO Difference between image WP Alt-Description and image EXIF Data

Hi guys
Simple question, but I guess tricky answer that need a bit deeper SEO experience:

It's no question, Alt-Description and some EXIF data makes sense for image SEO:
https://www.colorexpertsbd.com/blog/exif-data-on-image-seo-and-various-platforms/
https://developers.google.com/search/docs/advanced/guidelines/google-images

BUT what I am confused is:

In Wordpress I can choose a alt-description for an image which will be embedded in the HTML source text. So google...

Pro SEO Question: SEO Difference between image WP Alt-Description and image EXIF Data

from Search Engine Optimization https://ift.tt/2OcKSC7
via IFTTT