> For instance it is almost impossible to build a business around supporting off-label use cases (for instance selling necessary accessories).

There is no need for a business. Off label use is hacking around the existing commercial and regulatory system. The innovation to be had is fixing said commercial and regulatory system, not another business. Make cheap drugs or medical supplies, distribute them to those in need with as little margin and risk to the patient as possible. This is a utility system masquerading as a market. More duct tape by way of new businesses is suboptimal.