I have disproved this at home. Frog gets in idle hot tub. I turned up the heater. Soon, frog climbs out.

The point of using the metaphor is that something will have to give if we don't course correct.

yes, and, fortunately -- even the frogs have enough awareness they actually jump out before they are boiled.

In reality when these experiments were conducted the frog simply jumped out as soon as the temperature started to raise, frogs will not sit there in slowly boiling water and just die without trying to escape way before the water becomes dangerous.

We as a society are both ATCs and plane passengers, and most often, the latter. And when an overworked ATC makes an error, we indeed may fail to survive.