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.
every time this question comes up, the same answer is given. From the first paragraph of the guideline:
On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity.
At a more specific level, I think this is very useful for thinking about programming language communities and how they affect behaviour.