Inaccessibility isn't just a matter of discrimination, though discrimination underlies and defines these choices. Inaccessibility in itself disables people, more seriously and in more situations with more detriment than dictated by their medical conditions. People who can get around fine on their own on wheelchairs are disabled by the lack of ramps and elevators where they are affordable and feasible. People who'd be perfectly functional with dimmer lighting and less noise are made to suffer in spaces made artificially bright and noisy. People who can navigate websites with screen readers are excluded when websites are made opaque to screen readers. The inconveniences and exclusions are imposed by choice, not dictated by immutable physical reality.