He's a medical doctor. Physicians are very well versed in the scientific method of exploration and verification. Without that ability they could/would prescribe medicines and treatments based upon the latest whim.
I'd say he is imminently qualified to make these statements.
A high school student who is familiar with scientific methodology could make the same points that Crichton makes. And be accurate. Policy should not dictate research results. And that's what too often occurs. Check Crichton's webpage for two talks he gave that go into great detail. It's a breath of fresh air.