About 29% of adults over 24 are college grads and about 1% have advanced degrees. Only about 4% of people with average IQ (100)or lower have college degrees. It seems like there are a lot people who can’t handle a higher education (college, at least). As to learning a new trade, apparently there are a lot of people who aren’t disciplined enough to complete such training.
Do you have a source for these statistics, especially the 4% one? I think you are right, but I'd like to be able to cite sources for future discussions.
Only about 4% of people with average IQ (100)or lower have college degrees
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I am surprised that it is as high as 4%.