Because it's unscientific fear mongering. There's plenty already around covid 19, it doesn't make people trust the experts so to speak more if such flimsy "evidence" are being thrown around.
If people cared about scientific this pandemic wouldn't take so many lives.
People care about fear. They by themselves come up with the dumbest possible fears. In absence of hope for reason I'd prefer they feared the thing that steers them in the life saving direction.
Don't you fear more the people that manufactured and spread fear that made people buy products that harm them and the environment? Or people that manufactured fear that made millions go to wars so somone else can benefit? Manufacturing fear is game people play all the time. With effects way worse than saving lives.
Besides, fearing something more than death is not very reasonable. Your life is the only thing you have. You'll never have anything else. And your death is the the thing that makes you loose it. It should be feared the most.