We are creatures of habit. We feel confident in our habits. The trap of a habit is you close your eyes to doing things better.
I hate swimming. So I never do it. I have a habit to hate swimming. What if swimming will take my work to a new level by learning to love swimming. Is it worth the bother.
Yes, Variety is so important to growth that yo should push yourself to do even what you dislike. I had a few bad experiences with swimming and now I look at a pool and think ug. there it is the pool. I should go swimming for a week and see if it gets better. This is just one small thing. There are dozens of things every day that I avoid. It is all worth it to make your mind stronger and increase your ability to SEE.