In many societies, it is common for kids to get some additional independence roughly around age thirteen, and it sounds like Abhimanyu Mishra is right on schedule.
True, but the parent should be making these decisions as a advocate for the child, and not looking at the child as a resource for their own benefit.
I get that this is not how it's always been done, but if you are lucky enough to live in a time and place where we don't need the labor of our direct children to survive (New Jersey 2021 counts IMO), then you have a duty to act (as best you can) as the child would if they had a fully developed sense of reason and self expression.
Personally, I would be thrilled if my father had supported my development into a grand master.
How do you teach someone hard work and work ethic? I don't think many kids are willingly going to run themselves into the ground trying to become the best. Looking at my past, I kind of regret not being pushed further by my parents. I'm not some top achiever or anything like that, but I was good enough in the things I did (amongst the peers in my smallish town) that I could get away with the "I'm already better than X/Y, get off my back!"