What if I have a fetish and want to buy some crazy sex swing. I don’t want you to know, I don’t want the bank to know, or the government to know. This is 100% legal and 100% none of your business and I prefer to keep it that way.
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.