Wow, that`s very true...

> My disability is not a tragedy of biology. It is a failure of infrastructure.

Everybody is different. Tall, short, strong, week, two legs, one leg, short sighted or blind. So it makes a lot of sense to point (as a mistake) that our infrastructure favors one type over the others.

> the "Checkout" button is labeled "Button_Graphic_v2_Final"

This is a very good point.