From TFA: "civil authorities said that “Dr Warren’s instrument has little immediate direct use in civil aircraft.” The Royal Australian Air Force likewise decided that “such a device is not required—the recorder would yield more expletives than explanations.”

Well. No. Multiple air crashes across the world relied on recordings as a key part of their investigation. Especially when a plane lands in the Hudson, just to name one example.

This is very telling:

"Most damning was the Federation of Air Pilots, which declared that the device would be like “a spy flying alongside—no plane would take off in Australia with Big Brother listening.”

History wasn't kind here either. Just try and take off in a jet from a commercial airliner without the various safety equipment installed. The insurance companies alone will try to eat you alive, let alone every other agency.

There's definitely a repeating theme around safety equipment and authority/authority figures. The ridicule at the start is definitely a common starting point. Seat belts and air bags were both ridiculous inventions. Then they weren't. Then they became required.

Quote from elsewhere and not necessarily about flight recorders: "It has been said that any new idea must pass through three stages. First, it is ridiculed; second, it is subject to argument: third, it is accepted. The safety idea has reached the final stage. It is accepted." -- Earl B. Morgan, journal of Safety Engineering, 1917