The wrinkle in this discussion is the inevitable march of technology. It’s simply a lot more difficult to make a valuable contribution to society today than it was a few decades ago. It takes a lot more education and specialized training to gain the skills that put oneself in demand.

The idea that we can push water uphill, and bring the most struggling students up above an ever-rising bar, is becoming a controversial one these days. There is a small but growing chorus of voices saying “enough already”, on both [1] sides [2] of the spectrum.

[1] https://www.goodreads.com/book/show/36319077-the-case-agains...

[2] https://www.goodreads.com/book/show/51087394-the-cult-of-sma...

The unfortunate truth about IQ is that the distribution is on both sides of the mean. Some people are unteachable, but it sounds like you want to ignore the inconvenient.