@iaruffell
I also request alt-text routinely.
An example of something I may say: "I'd love to boost this post but there's no alt text on the images. Would you please add some so that I can boost this?"
Many of my requests for folks to include alt-text are well-received though. Some folks are genuinely unsure about how to write alt-text, and need some guidance; Some are only hearing about alt-text for the first time; Others may have low energy to give alt-text the attention it deserves, but still want to post media, and are happy to accept alt-text suggestions as the energy cost is low enough.
This is the subset of users that will respond positively to simple, polite requests that don't put up unnecessary barriers. Immediately jumping to harsh criticism of these folks will not usually have the same cooperative results, and I believe that is what Alice was pointing out.
I've also had some hostile reactions when requesting that people add alt-text.
One of the things they seem to take issue with is my stance on not boosting posts that don't have alt text. It's a very simple boundary, that I feel is reasonable. I'm not forcing anyone to do anything.
Some folks seem to perceive this as me depriving them of "reach" or "exposure" and thus some sort of punitive action against them. This feels wrong to me for several reasons that I won't dive into.
I feel like these sorts of gaps in communication are easier to resolve when people are civil and kind to each other rather than adversarial.