Most people don’t have enough money to commit this crime or even to do it on accident. The only time most people get large amounts of cash is if they are purchasing something and the seller requires cash. They may deposit cash for the same reason. Now the reason this became law was to catch drug dealers and tax evaders. They deal in cash very frequently. I think it is a bad idea for many reasons. It makes a criminal out of a non criminal. It forces banks into the policing profession. Whatever gain is had is not worth it.
The only person in my lifetime that I have known who dealt mostly in cash was my grandfather. He died about 25 years ago so I’m talking about way before this law was on the books. So using my narrow example, he didn’t run his cash through banks. He kept it at his home. Me, if I had cash that close to me I would spend it.
These days I find using ca$h where ever possible to be a revolutionary act.