So what if they’re wrong about you?

I was on a 20 min coaching call recently where I was trying to work through a situation where an acquaintance flew off the handle at me. The person had taken a situation and created an entire story around it, which was untrue and made me look like the villain. When I tried to defend myself, the person was uninterested in what I had to say. The coach had posed this question to me in response, “So what if she’s wrong about you?” Can you please help expand on this? I’ve been trying to understand this concept as it relates to my situation. Is there a particular podcast where I might be able to reference more info about it? Thank you!