One thing I like on the fedi that I think would be great here is that many people make an effort to add alt text to their images. You don't have to be 100% perfect all the time, but trying to make a habit of it makes our communities a little bit more inclusive of people with sight loss or no sight.
Doesn't need to be an exhaustive description (it's often better if it's not), just a sentence or two getting across the gist of what sighted people take in at a glance. I think of it as trying to share a meme with someone who can't see my phone, if it takes too long to explain it's not any fun. Obviously some things should be longer, like images of text you would transcribe the text or describing a complicated chart or graph, but you try to be concise because for screen reader users the whole thing is read out to them.
Knock on effects: sometimes if you don't get the joke the alt text makes it click, and alt text is machine translatable and it's fun to see how people describe their cats even if their posts are in french (or whatever language you don't speak if you do speak french).
tangential gripe about metadata
(I totally think it's bullshit there's no standard for embedding alt text in the image metadata, like EXIF stuff. It would be so convenient to describe your images once and have that data follow the file until it's changed or stripped off, especially for artists.)
The point I mean to make is: don't let perfection be the enemy of trying. I've slowly made it a habit to describe my images and probably do it 90% of the time.
