And further to that question...Bear or others with expertise, 

Could it be "just" a matter of getting the timing right on the dose...as in...

IF the cytokine storm wreaks havoc in part because it contines when there is little or no virus left to fight, then letting the virus run its course but administering BETi at a certain point toward the end of that course may (MAY) still save lives, mightn't it? In addition to potentially addressing long-term covid effects ?  Could they look for viral load indicators and finesse the timing?