So are you refuting the assertion that HN does a poor job with accessibility? Or just saying that you don't care because it works well for you?
The parent comment mentioned CSS changes, but I basically think the appearance should stay the same, and any accessibility improvements can probably be accomplished by changing the HTML for better screen reader compatibility, if needed.
Here’s a good starting point from Mozilla covering accessibility: https://developer.mozilla.org/en-US/docs/Learn/Tools_and_tes...
It's one of the only sites which does this today.