'Cause one guy is statistically significant, -right ?

It's certainly possible. For example, you can camp for months in a tent from Walmart without trouble and the zipper could break the first time you use it on a high-end tent. That doesn't make the guy camping in a Walmart tent a genius and the guy who bought the Marmot an idiot for spending the extra money.

Besides "Without trouble" doesn't mean the experience was as good as it could have been. I said that I wouldn't take one on a cross-country tour. I'd want the ride to be as comfortable, effortless, and worry free as possible on that kind of adventure and I'd be willing to spend some extra money to make that a more likely outcome. If somebody else wants to take a Walmart bike on a long tour, more power to them.

Besides, I don't think I'm really disagreeing with you. One can be a very happy owner of a Walmart bike.