So there is quite a lot of hedging in that paragraph: The rest of the summary is quite a propos: “In light of such findings, adopting current dietary approaches that include a high proportion of protein for weight reduction or glycemic control should be considered with care in those at high risk for kidney disease.
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Given the possibility of residual confounding within some observational studies and the conflicting evidence from previous trials, long-term studies including those with large sample sizes are warranted to better ascertain the effects of high protein intake on kidney health.”
It wouldn’t be surprising though that plant protein might be more beneficial than meat (esp. red) in some cases, without the obvious drawbacks of raising cholestrol levels. But as the article points out, protein consumption for most adults is adequate anyway, unless training for marathons or workouts.