Let's be clear; "The Science™" has become infected with politics and confirmation bias, and that is incredibly important to keep in mind as you read any "study".
I've not seen the "study" you posted, but let's examine it. The very first statement in the "study" says;
"Face masks and other personal protective equipment (PPE) are important tools to protect the wearer and others against COVID-19."
This isn't even pretending to be a hypothesis that needs to be tested. It's a conclusion in search of data to support it. Of course what follows is, unsurprisingly, data that supports it. They've already decided that masks ARE important. Now they're just doing THE SCIENCE™ that proves it. That's not how science works.
Semantics. The end result is that Dr Kuldorff is and has been prohibited from posting on Twitter for well over a month. It may be temporary, and they may allow him back on, but he is currently banned from Twitter.
Why did this happen? Because he tweeted this;
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Keep in mind that Dr. Kulldorff is a well-respected, Harvard trained epidemiologist. He is not a "conspiracy theorist" by any definition of the term. But Twitter decided that they knew better than this reputable doctor, because Dr. Kulldorff dared to say that public health oversold the effectiveness of masks which resulted in unnecessary deaths, a quite plausible explanation if you've ever watched older people who have been propagandized to believe that masks are a magical talisman and an impenetrable barrier that keeps them perfectly safe.
Huh? I've followed Dr. Kulldorff on Twitter for quite a while, and I'd be interested to see anything you think suggests conspiracy.
The example you give is simply a verifiable fact. It is the left that accepts lockdowns... BY FAR. This doesn't suggest "conspiracy". It is a veritable fact that left-leaning people are more accepting of lockdowns. It's equally true that left-leaning people severely overestimate the risks of COVID-19 compared to their right-leaning counterparts.
I almost spit out my drink when I read this. I mean you just cited a "study" by the EPA that has a pre-determined conclusion before ANY data was reviewed. The irony.
There it is again! "THE SCIENCE™"
IS NOT groupthink. The CDC dismally failed to explain how Dr. Kulldorff made any pre-determination without examining the data. They just say his assessment is not objective without providing any explanation at all. Convenient way to effectively dismiss a dissenting view.
I think that actually concerns me more. You don't seem to have any problem with well-respected doctors being silenced, "fact-checked" and reprimanded for posting "misinformation". That should concern everyone. What we are seeing with the COVID response is much more in line with propaganda than it is with science. THE SCIENCE™ has become a meaningless term in this regard.
Way back in April of last year, this opinion piece on Stat was published explaining the need to hear different views and opinions. Sadly, that has not happened;
Let's hear scientists with different Covid-19 views, not attack them - STAT