The problem right now is that there's a financial incentive for software to remain proprietary. As a user, you get to pick between "no help" or "proprietary help".
I would gladly pay big money for proprietary tools if it means regaining some of my sight until libre options exist. Looking at the rather sorry state of accessibility on libre software, I'll be dead and buried before the first digital eyeball with free software comes out.
In the US you'd have to get any implanted solution past the FDA, which is going to require a decent amount of money and probably a QA engineer and someone responsible for reading the regulatory documents and articulating their requirements for the team and the QA engineer.
I would gladly pay big money for proprietary tools if it means regaining some of my sight until libre options exist. Looking at the rather sorry state of accessibility on libre software, I'll be dead and buried before the first digital eyeball with free software comes out.