Yes, these are probably more expensive to make than Oreos, but that just means stores would stock them in addition to cheaper cookies. Some people would buy expensive-but-good cookies and some people would buy cheap-but-terrible cookies.
The problem is that the shelf-life for these is probably only a few days at best, and I doubt they’ll be that much better than cheap cookies even a few hours after baking. Try wrapping some in plastic wrap and leaving them on the counter for a week and see if you’d still pay 3x what you paid for the ingredients for that cookie.
I think this is almost entirely about shelf-life.
Yes, these are probably more expensive to make than Oreos, but that just means stores would stock them in addition to cheaper cookies. Some people would buy expensive-but-good cookies and some people would buy cheap-but-terrible cookies.
The problem is that the shelf-life for these is probably only a few days at best, and I doubt they’ll be that much better than cheap cookies even a few hours after baking. Try wrapping some in plastic wrap and leaving them on the counter for a week and see if you’d still pay 3x what you paid for the ingredients for that cookie.