[pasbesoin]

In the U.S., at least, there are many contexts (speaking very generally) where an acknowledgement de facto increases your risk.

One being that it can provide the pretext for legal action, such as a lawsuit.

Even if you've done nothing wrong, this can impose a significant burden upon you. And, given our legal system, there's no guarantee you'll come out vindicated -- or whole (e.g. financially), even if you "win" and are "vindicated".

P.S. And so, by extension, some people decide that if they do not understand a context and its implications, the best default action is to forego acknowledgment of it unless compelled.