Personal firearms are worthless against NBC weapons. And I wouldn't be surprised to know genetic weapons are being developed...
"We had to destroy the [village] in order to save it" doesn't really apply if you consider, say, New York City.
As https://en.wikipedia.org/wiki/Millennium_Challenge_2002 (and, of course, successful terrorist acts over the last decade) demonstrated, low tech is still Good Enough for a lot of purposes.