Ev and Biz handle Dowd just fine. It’s not that she doesn’t get it, it’s that she’s afraid of it.
Second, the comparison I often make here is with ball-point pens.
Imagine a world where everyone uses typewriters: they write novels, manifestos, historical surveys, and so on, but they do it all using typewriters. Now the ball-point pen comes along. People use it to write down grocery lists and street addresses and recipes and love notes. What is this awful new technology? the literary users of typewriters say. Ball-point pens are the death of humanism.
Twitter, like blogging, is what you make of it. It can only “destroy civilization” if you pay attention to the noise. Look for the meat.