Comment by fluoridation

>Why wouldn't they just skip the journals and publish the papers themselves? Sharing the research is the important part

To answer your question, sharing the research isn't the important part. These are researchers in the private sector, in a highly competitive field. Arguably, doing the research isn't the important part either. The important part is making money, and the research is a means to that end. Publishing the research doesn't further that goal, and, according to GP, it's so difficult that it may not be worthwhile trying.