It's all about control. I remember wanting to withdraw €5k a couple of years ago. Went to the bank office counter and they told me I could only take 3K as I did not warn them in advance. Later in the morning I was at another town and decided to go to the local office of the same bank to get the other 2K. After they introduced my ID in the computers the alarm started to sound all over the office and they told me they could not do it due to security restrictions and sent me to the office in my town. It was so embarrassing, I felt like a thief trying to steal my own money from an account I have had for 20 years. Of course I ended up closing the account days later.
That is insane, isn't it? No access to your own money and the amount isn't even "that great" in terms of money laundering, where billions are being put through with great consistency.