I was once in an interview for a development job where I asked what the companies stance on projects outside of work was. The head honcho said, "I don't want to

I was once in an interview for a development job where I asked what the companies stance on projects outside of work was. The head honcho said, "I don't want to know about them, and in fact I don't want you to do them. You should be getting all your fulfillment from work, and if you need more pay we can work something out." In my mind the interview died right there. He didn't get it, its not about pay, but about scratching an itch, trying new stuff out. I assume that he would be okay with me watching TV at night, or running with my dog, why would my decision to blow off steam with code matter to him?