Here we go again. At best, you can say that the experts often disagree with each other, which means we never know which science to believe. Once again, these people only accept the science they want to accept and deny the science that conflicts with their pre-conceived agenda. https://www.yahoo.com/news/fauci-dismisses-study-delta-efficacy-180953557.html?.tsrc=fp_deeplink
It is a preliminary study that hasn't been peer reviewed yet. Hence, yes, most scientists are going to be hesitant about just accepting the preliminary findings without question. This is normal, not part of a "pre-conceived agenda." This is what normally happens with studies that have not yet passed peer review. Ask anyone with a science background. Anyone.
The CDC based some of its recommendations recently on a study from India that FAILED peer review, lol.