They do their part keep metalworkers employed and paid, which prevents the trade unions from causing too much of a public embarassment. This is very important. Also, learning how to do wondrous things with metals for millenia, only to fall back on wood or bone or something of the kind seems a waste of civilisation.
Then, there is the shape. Chopsticks have an air of primitive tools from prehistoric times, with multiple uses. One could easily mistake them for tools to bore holes, for knitting needles or for something to hold up one's hair.
Forks are an elegant and sophisticated implement, perfected for their use.
Finally, they are more conductive to one's harmonious body development as one uses both hands for eating. With the relative scarcity of manual labour in many countries, eating becomes the most strenuous activity one will perform (well... perhaps the second most strenuous. But the first relies on very different muscle groups). I don't want my right arm to be twice as musclar as my left!