What would you think if I told you I'm just being realistic about how little my gf knows about how to code.
Why do you think she has a weak grasp of code?
I don't feel she is very smart. I have a law degree and she has a major in business.
It appears that you hold yourself above your girlfriend and her skills. However, you should encourage your partner to continue building their skills, instead of putting her down. Disrespecting her because of what you think she knows will only show that you lack of emotional intelligence.
What? I think she is kind of bad at what she does and shouldn't be a full time developer.
Do you know enough about coding to evaluate her? Either way, you should be supporting her, not accentuating her negatives.