Not about security rather than frustration. Ever tried to get a cashiers cheque from a bank in this country?
A few years ago I bought a new car and wanted a cheque from my bank, it took 3+ hours because I could not perfectly replicate my 20 year old signature in the back of the "BS" bank book AND to top it off I was charged a percentage of the value.
A few trips to an ATM machine over a number of days would have been much easier.