What you’ve presented is a deeply biased opinion piece, and it wears this immense bias on its sleeve. It fearmongers that thinking about cats as killing wildlife could cause “extremism” (it then cites as its lone example a man who suggested banning cats in New Zealand; soooo scary). It cites some organization called “Alley Cat Allies” who call it extremely biased with ostensibly zero credentials. They cite lobbyist and serial sexual harasser Wayne Pacelle formerly of the Humane Society who questions the methodology but even concedes: “We don’t quarrel with the conclusion that the impact is big.” And lastly, King herself does her own analysis on this meta-analysis’ methodology despite being – I emphasize – a professor of anthropology with no background in this field.

So your article has no one familiar with this field who could challenge if these statistical assumptions are actually reasonable. And here, given the authors are experts (and absent some published literature rebutting this in the 12 years since), I have no reason to believe their methodology would be so off as to meaningfully change the idea that “outdoor cats” are severely problematic.