To paint, with or without inspiration. It's always better when you're feeling inspired by something or someone. But, I've learned that it doesn't mean you shouldn't paint because you're not "feeling it" at a particular moment in time.
There's a book called Outliers, by Malcolm Gladwell, that talks about the 10,000 hour rule. He says it takes 10,000 hours of intensive practice to achieve mastery of complex skills and materials, like playing the violin or getting as good as Bill Gates at computer programming. So, how many hours a week would you have to paint to gain mastery at your art? There's 8766 hours in a year. There are 52 weeks in a year. So, if you painted 4 hours a week, it would take you 48 years to become a master. That calculation put it in perspective for me.
To opine further, if you did this as a part time job, painting 3 days a week for 8 hours a day, essentially a part-time job, it would take you over 7 years to become a master. As of the date of this post, I've been paint pouring for a year. But, though I sit at this point in my mastery level, I realize that I'm not stationary. The more I paint, the further I move myself forward. I've also learned that I can move my developent forward with any type of art in any kind of medium. It actually helps to leave paint pouring and stretch your mind with other styles, techniques, and mediums.
“One must work and dare if one really wants to live.” — Vincent Van Gogh
