DAE get homeowners who learn from TV and argue during the job?

I was laying a plush carpet in a den last month when the homeowner, who'd seen a DIY show, kept insisting my seam method was wrong. It got uncomfortable when he showed me a video on his phone. I explained why that technique doesn't work with our carpet backing, but his wife agreed with him, turning it into a debate. I stayed patient and showed them the maker's sheet. They apologized later, but it wasted an hour. So, a warning to have your specs ready to avoid these talks.