Every AI model has biases. Not maybe. Definitely. The training data reflects societal biases. The fine-tuning reflects the biases of the people who wrote the preference data. Your system prompt reflects your biases.
The goal isn't to build a bias-free AI — that's not currently possible. The goal is to know where the biases are, measure how bad they are, and mitigate the ones that cause harm. You can't fix what you don't measure.