OP, the first article you linked to would suggest that ACE inhibitors might be a potential treatment and/or preventative for Covid.
But obviously without testing to prove that, I couldn't possibly say if that is the case or not. It's certainly an interesting and plausible theory, but at this stage, that's all it is, a hypothesis.
I guess some statistical analysis might reveal if people already on statins and ACE inhibitors before they got ill have better outcomes ie lower death rates or less severe illnesses.
I know that in the case of statins, there were some recent articles suggesting that these did indeed lead to better outcomes and therefore suggesting them as a potential treatment or prophylactic.