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 disabled are in a very vulnerable position. If project managers lack concern and their consent is their only protection, human subjects will have no guarantees to that the procedures are safe. These expert reviewers and regulators are the only reason this article is about monkeys and not first round human subjects.