Countless topics that are not, in and of themselves, controversial have become incredibly politicized. And this is an issue that seems to only be getting worse over time. Let's take a not so hypothetical hypothetical based on something that recently happened. Not long ago there was a paper published that, using a novel method of measurement, suggested that oceans were heating some 60% faster than thought.
It turns out there were key errors in this paper, spotted just hours after publication, that made their conclusion (though not their novel form of measurement) unsupportable [1][2]. A couple of sources there since, as usual, the shocking headline will get a billion clicks, and the corrections maybe a dozen. But whatever, mistakes happen and that is not the point. But imagine now for a minute that this paper was instead going in the opposite direction and using a novel measurement had determined that the oceans were actually warming some 60% slower than thought, but it turns out that due to mistakes that conclusion was not supportable. Think about the backlash there and what would almost certainly end up resulting in personal attacks and suggestion of untoward motivation from the authors.
That's nasty business, but things that should just be 'science as usual' have started to become things people take deeply personal. I would feel quite uncomfortable publishing things that go against the grain on a number of topics. And this is before we get into things that ought be controversial. Increasing intellectual conservatism means such topics have gone from controversial to outright taboo.
[1] - https://www.sandiegouniontribune.com/news/environment/sd-me-...
[2] - https://www.washingtonpost.com/energy-environment/2018/11/14...
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Edit: As a perfect example of this, already in this very thread a person has stated an opposition to such journal because "I’m worried about corporate interests, ideologues, and charlatans publishing biased nonsense and making the world even more crowded with bad information without any recourse or ability to investigate what the motives behind the papers may have been." 'Seeking recourse and investigating the motives' often translates to finding the witch. Publish the 'wrong' idea and suddenly it's time to face the inquisitor. Publish the 'wrong' idea and make a mistake, and the inquisitor needn't waste his time - straight to the gallows with you.