There are a lot of down to Earth devs, but there's also some... how do I say this delicately? ... Assholes. These people grew up knowing they were smarter than average, but didn't learn to talk to an average. They always have to be the smartest person in the room. This person's sentences start with "Well, technically..." more often than not because you're dumber than they are.

A lot of us go through a period, when we're young, where we start correcting people because, well, we're smart and they're wrong. Most of us get over it and actually learn how to talk to an average (being able to accept when they are right and being able to STFU when they are wrong or explaining it delicately if it's actually something important). Mostly because we learn that an average hates to be corrected all the time. But also because conversations can be fun if you just don't worry about whether what people are saying is "technically" correct or not.