Framing a bullying and demeaning (and sexually harassing) environment in terms of effectiveness is optimizing for the wrong thing. We should be creating spaces that make people happy, with productivity as a secondary goal.

It's a bit like measuring chattel slavery by its economic output. The vastly more important issue — whether people would be able to own other people — is entirely orthogonal.

With regard to the armed forces analogy, consider too the difference in situations one is likely to encounter as a member of the military as opposed to a SV non-profit.