Haha, not a dumb question at all!
I work in tech, so for my job in particular, it was more important that I had a computer science-related major, actually. Most entry-level jobs have some type of writing test you get given when you apply, and I'm fairly sure you could apply with an amateur creative writing portfolio and still get hired.
In my experience, it's more about how well you can write rather than how you started writing.