At a general level, you may work with users, and it's important to not have fallacious thinking about users, e.g. "if I can dispel belief X their behaviour will change to Y". Instead, Talib would bet their behaviour will still be like others in the X-believing community. When tech is currently doing a lot of soul-searching about the social effects of e.g. Facebook it's useful to have a theory to explain why predictions of user behaviour were wrong.

At a more specific level, I think this is very useful for thinking about programming language communities and how they affect behaviour.