An article in Forbes covers 4 reasons why businesses should care about disability issues:
1.A large proportion of the population are disabled > 26% of the US population are disabled.
2. Disabled people are customers and employees
3. People without disabilities are family or friends of people with disabilities.
4. Anyone can become disabled at anytime
In addition, to long term disabilities, there are temporary and situational disabilities. If you are on noisey public transport, you may use subtitles because the situation means you can't hear, or you have broken your arm and can't use it for a few weeks.
Making your business more accessible and inclusive ensures the largest target market possible.
Disability advocates have for decades asserted that accommodating disabled employees, properly serving disabled customers, and otherwise taking disability rights issues seriously is “good for business.” But why, exactly? Disability awareness is a subject that slips much too easily into abstraction and vague moralizing. So it never hurts to get more specific by reviewing some basic facts about disability and businesses today.