I keep asking for legitimate uses of 10k in cash but the only answer I get is that it’s none of my business. It raises questions.
The argument for reporting is equivalent to "you have nothing to hide" and privacy. This is another aspect of privacy.
Furthermore, they don’t need the details. What if I just don’t want the government or bank to even know that I spent $10K at “Smucks Sex Store Co.”?
Anyway, I hope you’re starting to see the importance of privacy and cash. Even if they’re ridiculous and silly to someone else.