beginner Rev Tutorial - Line Equalizing

Is this really important? For ten years I flew alone although not a lot, and I never equalized my lines. Recently for the first time I flew with a very good flier who wanted to try my Rev 1 Carl Robertshaw Masterpiece (bought because I loved the colors). Soon after launch he looked at me and asked if I had equalized my lines because the kite didn't feel "balanced". I didn't think that would matter much, that my brain would just compensate for minor inequalities in line length. He said no, equal lines do really matter at any level. I had watched this tutorial in the past but thought it was for higher level pilots than I, but today I rewatched, measured, and learned one line on my lineset that he flew was one inch shorter than the other three.