The reason why the person who said "You're going to the Blue House" was being sincere

Looking back now, the person who said "You're going to the Blue House" was actually being sincere.
I was working at a shop when a woman in her late 20s visited. She was accompanied by a man. The man said, "Say hello."
Suddenly, the woman bowed deeply and said, "Hello. You are going to the Blue House."
Then she approached and said, "I think it would be best if you stopped now."
I don't think this woman was lying. If someone intentionally visits a workplace and says, "Go pull a scam here," wouldn't that be complete obstruction of business? It feels like the police would arrest them all.
And someone else told me on a bus:
"You are the only person in Korea who endured that. Your patience is number one in the country. No one else can endure that. They would definitely cause an accident. You are going to the Blue House."
Even though people were speaking to me with such sincerity, one person turns everything upside down.
So, I thought those people were lying, but in fact, they were telling the truth.
Why is this happening?
To all the women from Busan I've met... "I was with a girl who is going to the Blue House."
In other words, this person isn't an "innovator" in Merton's Anomie Theory—the one who overthrows the country—but rather someone who believed it because people spoke to them that way. And those people were perfectly sane individuals when they said it.