Adding keyboard control to an app makes it better for blind users and power users. Adding alt text to images makes it better for blind users and SEO. Adding ARI

Adding keyboard control to an app makes it better for blind users and power users. Adding alt text to images makes it better for blind users and SEO. Adding ARIA tags makes a page better for blind users and for testing with things like testing-library. I haven't found a single case where improving accessibility doesn't also result in a meaningful improvement for some set of users who don't need accessible features. There is absolutely no good reason not to make things accessible. Heck, I'd make an app accessible even if I had irrefutable proof that it had no users who need it to be accessible.