A lot of disabled people today subscribe to the "social model of disability" [0] rather than the "medical model". Under the social model, the obstacle is not some property of the individual experiencing an access issue, but are created by a system made by other people who didn't provide alternative access methods. Society and its inventions disable, rather than the individual's condition.
Clearly, disabled people have mental or physiological conditions that produce non-mainstream access needs. None of them deny that... but the social model invites us to take a society-wide ownership of this, and to better support a wider range of access needs by default.
In contrast, the medical model tends to situate the disability within the individual, based on their physiological condition. This tends to put the ownership on the individual (or their immediate carers), which in turn tends to perpetuate exclusion and access challenges.
[0]: https://en.wikipedia.org/wiki/Social_model_of_disability [1]: https://en.wikipedia.org/wiki/Medical_model_of_disability