Human Design makes a claim about physical mechanism that most divinatory systems do not, and because it is a physical claim it can be assessed as one.
The system holds that neutrinos streaming from the Sun carry information, and that as they pass through the body they imprint the design described in the chart. The 88-degree design calculation is explained in the same terms. The system's literature has pointed to the discovery that neutrinos have a small but non-zero mass, established experimentally in the late 1990s, as vindication of an assertion made in 1987.
What can be said accurately is this. Neutrinos do exist, they do stream from the Sun in enormous numbers, they do pass through matter, and they do have a very small mass. What is not established, and what physics does not hold, is that they carry or transmit information of the kind the system describes, or that they imprint biological or psychological characteristics. That step is the system's own assertion, and it is not supported by the physics it cites. It should be reported as a claim of the system rather than as a finding.
The wider position is straightforward. Human Design has not been the subject of controlled study, its type categories have not been validated against any independent measure, and it does not appear in personality research. Its practitioners generally do not present it as science, and the more careful ones present it explicitly as an experiment in self-observation whose value is to be judged by the person living it.
Commercially the system is substantial: charts are generated free by many sites, and the paid layer is analysis, reports and a training path through the founding organisation and a network of analysts. Anyone buying a reading is buying an interpretation of a 1987 synthesis, and that is the honest description of the product.