[kqr]

...humans with vision in good working order. There's a large subset of humans who would then have no way of contacting you.

[djha-skin]

Such humans are likely not programmers, which generally fits my use case. If I wish for my blind sister to contact me, I just give her my number.

[kqr]

Even if that were true, it seems strange to me to only want to be contacted by programmers.