I've reposted a number of old photos in the last year to catch up various platforms and one thing that's struck me is how often I used to use the captions for essentially artist's notes rather than alt text.
Sometimes it *is* annoying to write alt text, and there's definitely a nagging thought of "well, if you can't see this, what's the point" that I have to constantly push down. Ultimately, you just need to think of it as a basic courtesy to offer others who may need it for (1/2)