I'd never met anyone who actually believed in YEC until I went to work for a small software company in my mid-30s. I overheard two members of the sales team discussing a 'recent' test of a quarter f/ Mt. St. Helens that dated over 20K years old. HUH?
I asked another sales rep what the heck they were talking about, and he filled me in briefly about the flood, Genesis, & the tower of Babel all being literally true. He wasn't as invested in their beliefs as the other two were, but I could tell he was sympathetic.
I backed away slowly, and afterwards spent most of my time at work hanging out with the Wiccan accountant. At least she made sense!
I spent the bulk of my teenage years in Idaho during the 70s, so I was more familiar with the 'golden tablets/sudden revelations about black folk' myths than literal bible myths.