You should have said to them: 'you're only f* programmers'. Just as a joke. As a software engineer (?), I am quite fed up with people in their early 20s calling themselves 'architects', 'artist', etc.

You're not a scientist, and not an artist. Being a scientist and a programmer is extremely different because of a simple, seemingly minor thing: the lenght of the feedback loop. As a programmer, your feedback loop is sometimes an hour, sometimes a few minutes, sometimes a second (IntelliSense/other IDE help), sometimes weeks. But for scientist, it's sometimes forever. So it's for very different personalities.