Your claim is not supported by the paper:

"Furthermore, employment declines are concentrated in occupations where AI is more likely to automate, rather than augment, human labor."

No mention of rent-seeking.

No evidence they are being economically short-sighted.

> they'd rather own 100% of diminished capacity than share proceeds from exponentially increased capacity

They're using cheap AI to replace more expensive humans. There's no reason to think they are missing some exponential expansion opportunity that keeping those humans would achieve, and every reason to think otherwise.