But… That depends on the magic, doesn’t it? I’d argue you could easily use magic to fix disabilities. Or do healers not exist in your world?

It depends on the tone of the setting. Someone who gets their leg broken in a Forgotten Realms game can usually find a small-time priest to cast Cure Wounds on them, preventing most disabilities that aren’t from birth. Someone who gets their leg broken in Warhammer Fantasy has to hope within their gimped traveling distance that there’s a priest of the correct faith capable of appeasing the gods for the healing to happen, before their detriments become permanent. As such, having a disabled character in a game with more accessible healthcare requires an extra degree of explanation, on top of the PCs’ and players’ emotional response to someone being so downtrodden. The circumstances of their ailment, who or what was responsible, how they see their ailment and work around it, all are weights on the players’ suspension of disbelief that a GM has to take into account that they generally otherwise wouldn’t with John Miller, the able-bodied dude who runs the mill with a wife, three kids, and a problem with rats stealing the grain that he mills. It’s like a Chekov’s Gun in that sort of way, the GM as a storyteller surely wouldn’t spend the effort to decide that an NPC has a trait that is notably separate from the default without it being somehow relevant to the plot. The mage asks the party to do a quest for their magical research, a general asks the party to do a quest for national security, and a person in a wheelchair… what desire do you give them that wouldn’t be misconstrued as able-ist or a waste of that character trait? It’s very difficult, often comes with an air of making some kind of a statement, either that they’re a writer capable enough to wear disabled-face without it being offensive, or taking a preachy high-ground telling people a message about human sympathy, determination, and adaptability that they’ve already been made well aware of by the existence of popular culture.

This would be cool to see! Lots of ways to represent historically unrepresented people in alternative settings.

Well it is quite strange to be so offended of disabled people that you would leave the game But as a devil’s advocate what the problem is actually a world building one. If you establish that the world has magic, magic is widespread and powerful then the fact that there are disabled people could be slightly immersion breaking. For example in DnD lesser restoration a 2nd lvl spell would cure most blindnesses (well except if the person has actually lost their eyes). Hard to say anything more because you gave so little details. Ultimately that person had a disproportionate response but I find your meme both pointless what aboutism and generalization. Hope you have a good day.

Why are people in the comments arguing about what is or isn’t possible in D&S or Star Trek or whatever? As far as I can see it, there is no description about what kind of universe this plays in.

It doesn’t make sense to argue whether or not a wheelchair like that “makes sense” in a D&D universe?!