Listening to some of these arguments you'd believe we need to get an expert's opinion and a literature review to gauge the quality of the things we use in our daily lives.

I don't need an expert showing me a frequency curve to gauge the quality of earphones, I don't need an expert on manufacturing to tell me whether my current pair of glasses are more or less solid than the previous pair.

Part of being an intelligent person is also accepting that other people are just as intelligent as you, and not complete fools. People can see what's right in front of their eyes.