> Or by disrupting the rest of the class.

Kids that are struggling in class can be just as disruptive.

> Gifted kids in a single stream classroom need to learn to play dumb or become a social pariah.

Aka learn to function in society?

Here's my story from the other side. I have one gifted child and one child with dyslexia, but doesn't qualify for special education. My school district has a gifted program that is a whole separate school, but they have a handful of specialists to help kids struggling to read. They are shared across the grades and hard to get assigned. One of them has to actually be paid for by the PTSA since the district won't pay for it. That's messed up.