Are you a bad artist if you don't paint on your own time?
Are you a bad writer if you don't write on your own time?
Are you a bad carpenter if you don't craft on your own time?
No. You can be an excellent, professional .+\. But it's very rare to see someone at the top of their field who isn't passionate about their vocation. I haven't heard of many rockstars who started playing music for the money.