Are there really that many blind (or perhaps low-sighted?) people surfing specifically memes communities though?
If you neglect the matter, then you'll ensure the systemic discriminatory exclusion here continues. Mastodon & other social media platforms regularly set alt text.
Accessibility is definitely difficult
It ain't: you already have the text. Set it.
it is really hard for someone without specialized tools to even so much as see that accessibility text
It isn't. Pretty much every OS nowadays has it built in so it can be enabled. Boldly claiming otherwise indicates ignorance. Instead of proclaiming untrue assumptions as fact, it'd be better to admit your inexperience & ignorance on these matters and address that: I seriously doubt you tried.
And looking at several previous post to this community
Bad example to follow.
So what is your argument for any added value that offers
Accessibility adds value to everyone: introduction. That ableism is wrong & we can address it as was indicated shouldn't be hard arguments to figure out.
So what is your argument for any added value that offers, for someone to see simply the single word
Straw man: not suggested at all, which you would know if you followed the accessibility link that was provided.