Shortly before I retired, I was helping a customer at work and it somehow came up in conversation that he was a Flat Earther.
All I could do was think, "Must resist urge to disprove pseudoscience. Not proper time and place."
It was a struggle, but I persevered.
You did the right thing.
This woman said the space program is fake. I asked her some pointed questions and she was basically ignorant. She didn’t even know about Hitler’s V-rockets or the Saturn-5 rocket.