in fact, of the multiple blind folks i have seen discussing auto-generated alt text, all have negative opinions on the matter
update: i have now heard from one blind person (in this thread) not negative on the matter, though only in a "better than nothing" kind of way
@matildalove
As a sighted person i can clearly see the captions are inadequate at best and often just wrong. For example, Snoop Dogg smashing a buzzer on a gameshow is not "a man in a hat sitting in a chair", and Conan the Librarian lifting a dork by his neck is not "a man standing who wears wrist cuffs"
Just my observation. I try to give the best text i can and if i didn't have time for it then i didn't have time to make a good post. (Several times i have been part way through describing my image only to realize this isn't funny like i thought or it doesn't show what i needed it to. I have abandoned posts that were ready to go until i started to make alt text and really realized what i was doing. I consider this a feature to increase post quality and I'm happy for it. (Plus the environmental death and intellectual decimation, yadda yadda yadda))