Well, your sarcasm is probably correct. Scientists make computer models about the big bang; they use computers (machines) made from the physical world. There was a time when the physical world was not here. That was before the big bang. Since there were no computers then, and in fact there was NOTHING! So, were did the singularity/big bang come from?
Physicists say (we don't know yet), but it really does become a faith issue. When it comes to matters beyond the physical universe, do you put your trust in science? Or do you put your trust in God? Or some third option...