Complete baloney.
Science is NEVER conclusive. Ignore anyone who says that; They are either an idiot or they have an agenda.
For reference, look up the definition of the term "Scientific Method." Read and understand.
Science (from the Latin word scientia, meaning "knowledge")[1] is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions
The scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century. It involves careful observation, applying rigorous skepticism about what is observed, given that cognitive assumptions can distort how one interprets the observation. It involves formulating hypotheses, via induction, based on such observations; experimental and measurement-based testing of deductions drawn from the hypotheses; and refinement (or elimination) of the hypotheses based on the experimental findings.
You apparently don't believe either of those terms apply to the research presented in this article. I note that is your opinion, but certainly not mine.