Yes, I worry about this, too! OP I have the opposite situation! My parents were never interested in my school results, not neglectful, don't get me wrong, just never occurred to them that I might need support or a little pushing at school, in the end, I did very well (Oxbridge), but with lots of anxiety and poor working habits, I feel in a way it was a matter of luck I did get there, I wish they had been more present and more directive with my studies.
So with mine, I take a very active interest, but I have to stop myself obsessing about it, and keep in mind to always stay positive, praise for effort etc., I thought I was doing OK, but my DS1 is not doing very well, he is a smart kid, and all his teachers tell me he is not reaching his learning potential, so now I feel I should push more and actually insist on results rather than just effort, as PP was saying, but then I worry it will put him off learning, arrgghhh, so difficult!!
sorry, not very helpful, but yes, I struggle with this, too!