Writing a command for a cli tool is probably reasonably accessible to blind people.
But if I think of a typical workflow with unix tools (less, grep, awk, sed, sort, cut, etc), I feel like it involves a lot of glancing at the shape of a big page of results and deciding what to do. I wonder if this is harder/impossible for blind people? Maybe one just gets better at a different workflow involving eg lots of head, tail, grep -o, and less less.
I also would guess that tab-completion isn’t super accessible but maybe I’m completely wrong.
I guess 99.9% are. However, it is pretty hard to order a pizza or buy your weekly load of groceries with a CLI tool :-)
If you want to interact with the rest of the world, you will likely need to use the web...
(That specific tool probably no longer works, but Domino’s still has an API for ordering pizza… although apparently the new one isn’t officially supported.)