It's important to draw a distinction between positive tonality and censoring negative results. For example, the recent COVID-19 vaccines: they're commonly reported to be 95% effective and have some risk of side-effects. This can be reported factually, or spun in a positive or negative light. For example, a sensationalist might try to stir up interest by spinning a narrative that focuses on the vaccines being unreliab…
We're talking about published research papers, not people posting stuff on twitter. I have not seen anyone get a "cult following" from a research paper.