Can’t not.
As I write this, the year is 2000, and the Internet is a battleground of intellectual property disputes. Some people would like you to believe that, without proper financial incentives, music, literature, and computer software would disappear. After all, who would make music if they can’t make money on it? Who would write? Who would program? I know the answer. The answer is that musicians will make music, not because they can make money, but because musicians are the people who can’t not make music. Writers will write because they can’t not write. I’ve been programming for 16 years, writing free software for 8. I can’t imagine not doing this. If you can imagine yourself not doing what you’re doing, do something else. Do whatever it is that you can’t not do.