I disagree with nearly all of this post and its parent. It has much conflation of ideas, but I will argue that this is the thrust:

"When bad actors are made more capable they are made more destructive, therefore, no one should be made more capable."

This idea represents stagnation and fear of one's fellow man. We prevent ourselves from improving our understanding because we worry someone will use it against us. Today's society as an example, this is almost an inevitability! The comments above focus exclusively on the potential negatives. This is not a useful way of conceptualizing the problem.

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Albert Einstein said in the 1940s: "The release of atom power has changed everything except our way of thinking... the solution to this problem lies in the heart of mankind. If only I had known, I should have become a watchmaker."

The big problem is that all these new war machines and the surrounding infrastructure are created with the tools of abundance.
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These are examples of intellectual augmentation by collaboration of scientists and engineers. However, the resulting destructive technology is made available by the concentration of material resources and therefore is wielded by a select few in powerful positions. Note that the former cannot easily create such technologies without the latter. Note that the former are nearly always NOT the ones operating the technology!

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PU President Shirley Tilghman describes a new library that will replace several "isolated" departmental science libraries with one "scientific" library.

Well, to harvest more protein, that scientist makes the shark's brains four times bigger than normal and now the shark's are super-smart and eat all the scientists.

These are simply good intentions and unintended consequences. In the example of shark scientists, augmenting their intelligence by collaboration result in them getting eaten. However, in both examples, a sufficiently augmented intellect could have recognized and avoided the unintended consequences altogether.
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Critically: do not conflate the consequences of acting on knowledge, with intellect or the augmentation thereof.

The material results CAN be negative. The phenomenon of intellectual augmentation itself is only of positive consequence: problems CAN be solved more effectively. Problems can be solved poorly and have unintended consequences but this is unrelated. The wrong problems can be solved and this is also unrelated. The problems solved can be for the sole purpose of killing and this is also unrelated.

The sentiment is that intellectual augmentation should be discouraged in general because The Few that have the resources to produce destructive results will be made that much more dangerous, by intent or by mistake. This is FEAR, not certainty. The far more dire consequence is that your fellowman, who wishes to collaborate and solve all sorts problems for the greater good and otherwise, is DENIED the tools to facilitate his problem solving. And subsequently, humanity is DENIED all the good that could arise from such a scenario.

I don't intend to deny those who are pessimistic about the overall effect of augmentation tools in the hands of present-day humanity, nor am I an optimist on the subject. But to state confidently about net loss or gain to humanity from such tools is FOLLY. I would say: make intellectual augmentation tools and have them available to everyone. Not because bad things won't happen, but because good things WILL happen. This is where the heart lies and where it GROWS. And don't we agree it's this that is lacking?