In a way you are correct, it's authors intent. RBL and Leo desire to publish. Most, and practically all well regarded, medical journals do required original, novel content, because it brings subscribers (See it here first!). End result: some meaningful data will be held back until publication.
See, for instance, what medical heavyweight journal New England Journal of Medicine requires. Of interest, heading: No Prior Publication
"Posting a manuscript on a non-profit preprint server for feedback from the scientific community" is allowed. That seems to be what RBL is intending to do.
NOTE: My example DOES NOT IMPLY that NEJM would be the publication receiving RBL's manuscript. Not likely. There are better suited journals for in-vitro studies.
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