I don't feel that parents really want 'the best for their child' (#6 in the article). When a student is the best in their class, that can come with another set of issues like boredom. A student who isn't being taught anything new doesn't learn how to learn. When things get harder and they lack this ability, self-esteem tends to take a hit. The end result is a gifted child not reaching their full potential as well as the mental health issues that come with low self-esteem. They may end up setting a low bar for themself because they feel they don't know how to get to a higher bar.
What I've said about middle school is students want to fit in yet stand out at the same time. IMO, parents want this too. They want their child to have a 'just right' education. There needs to be a bit of struggle for growth to happen and a student with the need for special ed needs to be identified early so they don't stand out..like being the only one who hasn't finished the chapter when the discussion starts.