I just explained to you why that's not true. Let me try again:
Attacking a computer means finding a bug and keeping it secret until you use it to attack said computer. Defending a computer means finding a bug and disclosing/fixing it so that nobody can use it to attack said computer. I hope it's obvious to you that these two ideas contradict each other.
Please let me know if you have questions. This is very important and not intuitive at all. I'd love to help you understand it better.
Attacking someone who is attacking you is also a form of defense. Please let Sun Tzu know if you have questions. This is very important and not intuitive at all, though I don't particularly care about helping you to understand it better since it's considered common knowledge in the modern era.
I can do this all day: In order to be able to attack somebody who's attacking you, you need exploits available to you. If you have exploits available to you, you're making yourself attackable. Do you really not see the problem here?
Attacking a computer means finding a bug and keeping it secret until you use it to attack said computer. Defending a computer means finding a bug and disclosing/fixing it so that nobody can use it to attack said computer. I hope it's obvious to you that these two ideas contradict each other.
Please let me know if you have questions. This is very important and not intuitive at all. I'd love to help you understand it better.