The thing about changing the "alt" text is that you can do it ONLY for one use in the particular discussion that you are in.
The rest of the world sees (if they even look) this nameless generic add that really promotes FAA as a business, using our image. Search engines, thus, encounter zillions of images all advertising "sell art online" or some other interest that the business has.
I wish that the "alt" text automatically had MY name in front of those generic messages, .. at least.
MY image should be selling ME.
My main interest, then, is what the search engines encounter. Viewers will probably never read the "alt" text.