I don't think the wording implies a career or job. It's more implying an identity. "I'm a rock climber", "I'm a gamer", "I'm an artist", "I'm a mother", "I'm a father", "I'm a gym bro", "I'm a graphics programmer". None of these necessarily imply career or job, though they do tend to imply more than just a passing, casual involvement.
I agree with this. I've identified as a graphics programmer for a long time because it's a passion of mine and the fact that it's my profession seems almost like a happy accident.
