I have no idea why this is the case, maybe you do? If we are weaponizing viruses, its very very possible to also engineer a “contagious cure”. In virology except in a few cases the variants are typically less deadly. The omnicron variant of the current epidemic did seem pretty quick though considering influenza still kills a remarkably large number of people. Speaking of which, did you know that when CRSPR technology first was released you could buy a gene editor for under $1,000? How is that ethical? Well it seems to be the perfect double edged sword in a sense yet I do fear the ramifications when the blade comes back.