If they deliberately skewed their results to fit their narrative, yes: that's obviously reprehensible. That's not what we're talking about, however. We're talk

If they deliberately skewed their results to fit their narrative, yes: that's obviously reprehensible. That's not what we're talking about, however. We're talking about what level of suspicion is appropriate in various scenarios. It's unlikely we can _know_ if results were purposefully sabotaged or not. We have to make some best guess. Interested parties funding studies is deeply suspicious, and should be treated with a hefty dose of skepticism. Hand waving that "maybe the researchers were motivated by empathy?!" is not at all equivalent. That is a incredibly low bar that, itself, undermines trust in science, as one could trivially make up similar excuses to distrust virtually any study ever conducted. Oh, researchers found declining sources of fresh water year over year? Biased. They probably just like cheap drinking water. Better ignore it. An Aquafina-backed study shows the opposite. That study is biased, too. But they're both equally morally reprehensible.