can you explain what you mean? I shared my experience of why the argument was formed from my experience in education and community communications.
I volunteer for two arts organizations and I work for a tech org - one of which I sit on the board for - who work (at least partially) with young, disabled and/or vulnerable people, and/or have to check communications against best practice.
I have at times been physically long term disabled (although right now I consider myself able bodied), my wife is long term disabled, and I have previously worked with arts organizations focused around hearing loss, sight loss and mobility, and prior to that I was a curriculum organizer for a school district with a focus on engaging those with learning disabilities more in the classroom.
Obviously, the disability community is not a monolith and with any nomenclature (see: differently abled, wheelchair-user debates) there are people on both sides of the argument who do and don't have disabilities.