Yes, and it requires much more than a single nuclear warhead

A single nuclear warhead is not capable of ending life as we know it, where did you read that ?

Using the same argument, 10 is one symbol. It is the “ten” symbol.

I’m just pointing out that it makes no sense to say that this system allows writing any number as one symbol.

6 is 2 symbols though

If you never use medicine that was developed with the help of animal testing I guess you could. If you do use pretty much any kind of antibiotics though, or are unfortunately diabetic and have to use insulin, then it would be pretty hypocritical.