Dude, gifted programs. Advanced classes. They are together. This is really easy. Any reasonably sized school will have enough to fill out an advanced class.
And this ensures all students can live up to their potential! How about that? Instead of only the ones that can afford stupid high tuition. Who have to pass screening, and wait times, and wait lists, and then long commutes. If you want more advanced people in society, the way you do that is opening the doors to more people, at all points in their life, right where they live.
And what the other guy said about selective public schools.
And yes you’re on about government approved education dogwhistle and authoritarianism. Dude, you’re right down conspiratorial thinking.