* It is unknown if ACE2 is the only important receptor * Study doesn't actually count the amount of ACE2 receptors, just the amount of RNA expression (ok, you can probably hand wave this limitation away) * Study also shows a difference of expression ratio of 1.6% vs 0.4% in males vs females (n=2 vs n=6) * There was a SINGLE asian male in the data set
Given these limitations of the original paper, at the very least, I would say that you should shy away from definitive statements until stronger evidence appears.
The top comment on biorxiv ran with some of the ideas from the paper, and looked at a more general and larger data set and found no statistically significant difference between Asian and Caucasian lung tissue samples in terms of ACE2 expression when measured in bulk (see https://uploads.disquscdn.com/images/5cb4b2c5e1ae3cf8454e870...)
That said, it's certainly a cool paper.