That would be great, but reality is that product development at many places depends on a few people to be aware of accessibility in the design process.
And there are situations outside of product usability it will be helpful to know what is commonly seen. For example, when someone asks you to pick up X item at a store that is a color that you have a hard time identifying.
Can you imagine telling someone a wheelchair, that should just buy a portable crane to get into buildings that uses stairs?