If you don't nurture a wound, you'll get an infection. If you don't clean your hands before eating or you eat something foul, you get diarrhea.
The outside world is a dangerous place, and if you wish to interact with it, you should have your defences in order and take necessary precautions. And then still bad actors will get through, such as the yearly flu, so you must deal with that as well.
You won't defeat the outside world with offense, there's just too much out there, adapting too fast.
If you don't nurture a wound, you'll get an infection. If you don't clean your hands before eating or you eat something foul, you get diarrhea. The outside world is a dangerous place, and if you wish to interact with it, you should have your defences in order and take necessary precautions. And then still bad actors will get through, such as the yearly flu, so you must deal with that as well.
You won't defeat the outside world with offense, there's just too much out there, adapting too fast.