For context, I work in biotech. I’ve worked with animal subjects and human volunteers, and participated in the internal review process. I’m grateful for the guiderails that protect human subjects, and hope they hold up. Because as your comment points out, humans with disabilities are in a very vulnerable position. If experimentalists lack concern and patient consent is their only protection, human subjects will have no guarantees say all that the procedures are safe. These expert reviewers and regulators you mention are the only reason this article is about monkeys and not first round human subjects.