First, this isn't a study; we don't yet know how truly effective this is for large number of patients.

Secondly, developing respiratory distress and requiring intubation is just one of several possible outcomes.

For example, it appears that strokes due to blood clots appear to be a significant risk with COVID-19 [1].

[1] https://www.washingtonpost.com/health/2020/04/24/strokes-cor...