"and if our situation does not improve we can stop it"
Who's going to stop it? The same folks who are going to enforce face masks? Or social distancing? People are going to do what they want to do. Los Angeles, San Diego, and Miami beaches prove that.
Minneapolis, MN is proving that.
Trump is proving that by refusing to wear a mask while telling everyone else they should be wearing masks.
How in the hell is anyone going to stop the HCQ train once it's started? We can't get people to stop taking homeopathy therapies even though they've been proven ineffective (other than placebo effect).
There in lies the real risk.
Hypothetically, prescribing it to all the infected, THEN studying its effects, only to realize that it indeed has a NEGATIVE impact is actually opening Pandora's box. It's like fitting toothpaste back in the tube - the risk is simply too great to follow that method.
Continued controlled, clinical trials should be relied upon to establish the efficacy of HCQ.
And if the main concern here are deaths, then the best way to stop people from dying is helping mitigate infection. Don't let them get sick in the first place, stay at home and stop acting like it's time to return to the previous status-quo. Vaccincation trials are just getting underway, but we should 'open everything up' now?
And part of that reasoning is that there is a promising treatment for those who are sick?
Terrible risk analysis.