Manwich is a canned sauce you add to hamburger, it’s roughly BBQ flavored in nature.

It’s like a tortilla made of a giant cornchip. Breakage can be an issue but they don’t explode like glass or anything.

A square, made of squares with his chin on a different square, magnificent

Exactly, lesser restoration is a spell 5th level clerics can cast, it won’t be super common but every temple should have someone in charge at that level at least. I’m not saying it’s impossible for people to be blind or otherwise have physical dysfunctions but magic on the scale dnd assumes means there will be lower rates of it. Did the player overreact? Yes, but he wasn’t 100% wrong