This is not true. It’s not the amount of material that a component uses that decides how robust it is. It’s quite the opposite. Having smaller components means that they’re more efficient, require less voltage and current to run.
I appreciate your post about telling users to be cautious but as @catsay said it’s best to let anyone do what they want with their hardware. If someone wants to venture into overclocking probably knows how to Google things and knows the risks and reward associated with this practice.