The idea that this opposition is merely a matter of context misses the fundamental asymmetry between protection and predation.
The presumption of market fraud is a defense mechanism for overall integrity, essential for investors to rely on a price reflecting reality.
Negative fraud tactics are not the logical opposite, but a deliberate intent to corrupt this integrity for quick gain, such as manipulating the price before a share buyback.
The real risk is to dilute the conviction underlying investor protection by considering them as mere conceptual polarities.