The problem with this argument is that you have concluded that God, if existing, has to have been created. Forget that others including me are theists. How would you prove or what could you bring to prove that God, if existing, has to have been created?
No, I conclude using Agrippa's 5 modes, that if you can learn to catch yourself in your thinking, you will realize that there are no strong justified reasoning of what the world really is.
I just need 3 humans and all 3 can be found on this forum.
One: I know that the world is natural.
Two: I know the the world is from God.
Three: I have learned by thinking about what you two do, that I don't need to know what the world is. Thus as I have a life without knowing what the world is, you can live in the world without knowing what the world is. We are in effect playing psychology and how we cope differently. You two cope by believe that you both know, but one of you don't, yet both of you live in the world. So I have learned that I don't need to know. Thus I am a skeptic.
You are as most people influenced in the limited cultural tradition of truth and God taking for granted that we can answer what the world is with truth/God. I just don't believe in that, because I don't need it to live and I am still here after doing that for over 20+ years. And I am not that unique. Others have done this before me, are doing it now and if induction holds, will do it the future.
So as long as you take truth/God for granted regardless of your specific science/philosophy/religion I can do a falsification in effect: I can do it differently and we are both a part of the world, right?
It is that simple. You hold truth/God and I don't, yet I am still here. And that goes for all other humans, who don't hold your truth/God or if you like your correct interpretation of the world.
That has nothing to do with you being what you are individually. It has to do with that you don't need to doubt your beliefs as long as they work in practice for you.
But that also is so for all other humans including me.