Hacker News Reader

I'm not saying that ACE/ARBs promote covid19 severity but rather they promote nitric oxide production.

Yes, they do that. It would be consistent with the results seen:

Treatment with ACE-inhibitors is associated with less severe disease with SARS-Covid-19 infection in a multi-site UK acute Hospital Trust https://www.medrxiv.org/content/10.1101/2020.04.07.20056788v...