Wow Will was such a part of my childhood watching Star Trek. Obviously, he didn't appear often but he was memorable simply because there were so few people as young as him on the show. Sad to hear this all around. This also brought back memories of me being required to play piano growing up. I hated piano, performing (recitals), playing in general. I was terrrribbleee (still am) and was put up in lessons for 12 years…
As I have young children of my own today, I'm faced with these questions. What is a healthy amount of pushing vs too much? What about not at all? The only thing they need to be good, not even best, is the studies that will enable them to work. Just help them if they're falling behind. Os support them if they seem to have a passion for something in particular. But otherwise, let them have a life.
Kids don't always know what's best for them, and they will sometimes take short-term satisfaction (not having to endure the monotony of deliberate practice) at the expense of long-term satisfaction (being able to play well after a time).
That's not to say parents should always force the issue. Certainly sometimes the kid really is expressing a preference that should be honored. But not always.