Having a bias in this case doesn't mean you're a bigot, and it doesn't mean your belief is wrong. (I'm using the word bias in the sense of a predisposition, predilection, partiality or leaning,) Indeed, the reasons for your bias may be very sensible. But in choosing one possible explanation over another, your bias is revealed. Moreover, nothing compelled you to take that step. You could remain open-minded on the topic without suffering any harm or disadvantage. That suggests your bias is strong.

Possibly the two strongest scientific theories by the evidence supporting them are Thermodynamics and Quantum Theory. Both of them are founded in the mathematical laws of probability. And according to Thermodynamics and QT, the probability that our universe could exist is staggeringly small. If you didn't already know of our universe, yet claimed it doesn't exist because its so unlikely, you'd be wrong.