That study is somewhat alarming, but I think they were only looking specifically at parts of the brain related to smell and taste, not the brain as a whole, as

That study is somewhat alarming, but I think they were only looking specifically at parts of the brain related to smell and taste, not the brain as a whole, as stated here: "Based on prior expectations based on animal models and post mortem findings, we chose to focus a priori our primary analyses on a subset of 332 regions-of-interest (297 of which passed the reproducibility thresholding) from the available IDPs that anatomically corresponds to the telencephalic primary and secondary connections of the olfactory and gustatory cortex"