While a bit snarky, this points in the right direction. OP simply seems to be more extroverted, enjoying personal interaction with colleagues more than their introverted peers. At least from my experience at work + university, IT attracts substantially more introverts.

In addition, family life/ living situation can make a huge dent. Think being single + living in a shared flat in the center vs being married living in a house 1h+ commute away from the office.