This is true. To think of it, some lawyers probably work for free in the weekends for the poor; some doctors probably read about medical breakthroughs (and inevitable solve family cases) at home, and teachers too. I don't see anything wrong with either approach to coding, be it treating it strictly as work or as a hobby. But if someone expects good code, best practices, 100% test coverage, etc. in a side project - that's going too far.