I have a feeling the professor had the same opinion before he was a professor.

For fun, let's dissect his statement.

humans generally get less miserable when we collaborate
Ah, the good ol correlation equals causation that academic essays teach one to employ.

when we collaborate
A top notch outcome indeed. What incentivizes people to collaborate but shared ideals?

miserable
This outcome's the dumps, yo. What deflects this outcome but shared ideals of the type that constructs a sustainable system that diverges from the outcome of misery?

when we choose ideology over actual humans
My ideology is that humans come first. Checkmate, professors!