If your a white belt or a black belt, you always have some journey left in you. Karate is not just about training hard and doing your best. It is also about having the time of your life and making new friends. We have like fun days and training session with important people. Gradings are fun too.
Even being a sensei is fun, you go to senior training. Karate is not just a hobby, its part of you life. Its amazing. The best thing to do is not give up, yes, some people may go off karate. But if you do. You may want to do it again. Thats why you should not go off it.
I hope you keep up the GKR journey and become a sensei or a black belt, good luck and train hard, remember have fun!