Why did inventors of early mechanical novelties, such as toast-buttering devices, consistently miscalculate?

Answer

They failed to account for the efficiency of the human hand and simple existing tools.

Many early 20th-century inventors sought to automate every mundane task but failed to recognize that existing tools were already perfectly optimized for the job. Devices intended to automate buttering toast were inherently clunky and complex, ultimately proving more time-consuming and less effective than simply using a knife, which remains the superior tool for that specific task.

Why did inventors of early mechanical novelties, such as toast-buttering devices, consistently miscalculate?

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World's Craziest Inventions (Level 1-100) - YouTube

The World's Craziest Inventions - YouTube

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