Part of why we should accept having low creative energy is because A) your body and mind deserve a rest every once in a while, and B) the immediate spike of energy and creativity once your out of the slump can help you make some AMAZING things! At times it may even be the difference between growing as an artist and falling in love with your own art!
So it's okay to indulge in stuff you like if you can't bring yourself to pick up a pen, brush, stylus, or whatever!