If they were really interested in helping the disabled, they would buy the patents from that one ocular implant company that went bankrupt and continue making/servicing that tech. It would also be 100% on-brand for Musk to put money into something like those super high tech wheelchairs that can go up stairs and hit high speeds, or those high tech prosthetic arms which are almost there but not quite good enough for daily use. Neuralink was always an investor grift.