Another player who was at the table during the incident sent me this meme after the problem player in question (they had a history) left the group chat.
Felt like sharing it here because I’m sure more people should keep this kind of thing in mind.
Plenty of examples of mechanical devices in the DND world that are at least on par with a basic wheelchair, not sure why that would break immersion
I believe the point was that it didn’t fit the setting for the main characters of a typical fantasy plot—not being well-suited to traveling significant distances in rough terrain, among other things—not that they wouldn’t have the basic tech. You don’t see many active-duty soldiers or mercenaries fighting in wheelchairs and it seems likely the same considerations would apply to adventurers. You can come up with settings where it isn’t totally implausible, but it will require some careful thought and ingenuity.