In general not enough attention is paid to just flat out whether an entire business process is accessible. Or perhaps more - how you can adjust your business, your offering, or your process in order to make it possible for more people to access it, or to be employed by you in delivering it.
If you treat accessibility as a box checking exercise done by web and app devs you can end up worrying about making the driver portal of your ride sharing app work for a blind user, rather than thinking about what features are needed to make it possible for a person in a wheelchair to hire a rideshare that can accommodate them.
Accessibility doesn’t begin and end at screenreader support and text contrast levels. But if you leave it up to developers to do then that may be all you’re going to be able to get.
In the Web context, accessible websites also work better for search indexing, and for semantic processing, and for manipulating with Javascript (ie: addons). Text annotations for images are a huge help to all sorts of people and software, not just folks who can't see the image.
The main reason to support accessibility work is that it is the right thing to do for disabled people. But if that doesn't motivate you, there are selfish reasons for people without disabilities too.