I think that's an extremely ungenerous read here. The thread is about how different size bills and different color bills solve a lot of problems with people who have low vision. Adding braille solves the same problem, but for a subset of people that different sized/color bills solves.

If you have a good, working solution that's widely used worldwide, and someone suggests a worse solution that works for fewer people, it's more than fair to point out that "your solution is worse, less common, and works for fewer people".

Your last sentence is a low effort strawman, I'm not sure why you felt it necessary to include.