Ah, I see the disconnect. In this discussion, "disabling" is not the same as "detrimental." Disabling is when you are unable to do important activities that others can do. I'm not an expert here on the subject, but this is my understanding.

For a simplified example, imagine two government buildings, one with and one without an accessibility ramp. A person in a wheelchair is able to access the former, even if going up the ramp takes longer than the stairs. Not having the option to take the stairs is still detrimental to the person, but they're still able to access those services. The second disables the person, as they're no longer able to access important services because they are unable to take the stairs.

Accommodations help keep "detrimental" from meaning disabled. The voice at the street crossing that says "walk", curb cuts, and closed captioning all help people participate in daily normal life, despite having those sensory disabilities.

There are other designs that are more holistic as well - for example, if those same government services are accessible online, or the agent makes house calls, it naturally makes the services more accessible to more people. (Note: I'm not saying that this specific example is a good idea - just as an example of "how we design our society affects how people can participate in it.")

There are limits to accomodations and a blind person is never going to be a good sniper