There is an advantage if he loves it and wants to do it. There is also nothing wrong with perusing other sports. I have extended family members who were heavily involved in karate. Two went on to second degree and did it because they really had a passion for it and a community there. One of them has been involved for 30 years now and isn’t hard core training but does it for a form of exercise and enjoyment.

I know others who stopped at first degree or well before. It sounds like he wants to focus on tennis. Let him do that.

My kid is about to get his black belt next month, and we are wondering whether he should work towards his first degree or more? Is there any advantage to it? I dont want any karate haters here-just need to know if there is an advantage to advance further? he loves it but also feel now he should focus more on tennis which is his primary sport and school instrument. TIA!