[mygo]

Sure this problem can be addressed at the language layer, but as you've alluded to, I think it would be more applicable to address this issue at the text-editor / IDE layer or even the build tools.

There's tons of IDEs that make developers better at coding, with things like automatic syntax checking, refactoring, inline debugging, autocomplete, etc. Would it make more sense to develop a developing environment that makes disabled developers better at coding, with whatever features would make their experience better?

It would probably be easier to get a disabled developer to use your editor than to get a disabled developer to use your language. From what I can gather, it's hard enough to get employment as it is for them (maybe they can only work remote, or maybe they can be physically in the office but they're blind). I'm not sure if they have the luxury of being able to choose what language they get to use. But I'm sure their employers would allow them to use the IDE & tooling that works for them so long as they output code that fits the company stack.