Curing neurological diseases isn't the same as bumping up IQ.
But 30 points is fucking huge...
Like, that's the difference between dead center "average" and a legal intellectual disability.
Because 30 points is where communication becomes hindered.
So if everyone got a 30 point bump, it would change absolutely nothing. The people being manipulated would be 30 points smarter, but so would the people manipulating them.
IQ just isn't a big deal, that's why they dropped the threshold for "genius" from 160 to 120 and added things like motivation and drive.
What really matters is the difference between people