What is QED doing here? You boil down what at best would be an extremely complicated cost-benefit analysis to a simple 'if this then this' statement and put QED as if something of meaning was proved. Poor form.
As some other posters have pointed out -- If your simplistic logic is 'anything that creates fewer deaths' then the following hold true as well:
Driving? - Prohibited!
Flying? - Prohibited!
Space travel? - Prohibited and erased from history!
Walking on the city sidewalk? - Prohibited (tripping hazards, lightning, gang violence, errant vehicles, falling masonry - you get the idea...)
Swimming in the ocean? - Prohibited!
Don't even ask about the 'occasionally deadly' activity of running. That's strictly forbidden!
Eating can be deadly, but you also can't live without eating. So that's a tough one... Same for sex, I suppose.
Alcohol (and most other recreational drugs / tasty foods)? - Out.
Also most prescription drugs (definitely including these new gene therapies they're calling 'vaccines'). They seem to kill people as well. Though they may save some people too...
Most of the things that people enjoy and most constructive human behaviors contain some risk. Indeed living for as long as possible (as safely as possible) doesn't seem to be the goal of most people -- and for many good reasons. So sisk of death is acceptable -- even ubiquitous. Surely it can be mitigated (by wearing seatbelts, for example) it doesn't make sense to always mitigate it at any cost. For example, I'm not sure the airplane life rafts or the TSA pencil out. I suspect they don't and they're the results of some kind of accident of history (say when more airplanes landed successfully on water) or garden-variety corruption . Put anther way, the cost of mitigation should not outweigh the actual benefit. This is difficult to calculate when it comes to say weighing the lifelong empathic connections formed by seeing the faces of human beings agains, for example, the least valuable 10% of the most unhealthy 10% of peoples lives. These are not easy things to weigh against one another because they first must be quantified and people seem loathe to quantify such things. Luckily in the real-world scenario you're considering the overwhelming majority of meaningful risks of death from respiratory illnesses accrue predictably to certain demographics -- meaning that they can be dealt with either unilaterally or efficiently on the level of those cohorts without the need to seriously consider the 'should everyone wear masks' question.