I am not smug, I am well aware that I could be scammed, if a new, clever unknown scam started and I was caught before it was publicised. But many people who are scammed should have known better. They have no excuse for being so gullible. This doesn't stop me being deeply sorry for them when they suffer. But if I do something stupid I accept that it is my own fault.
Nearly all the scams people fall for are common well publicised ones. Some have been known and warned about for years, even a decade or so. They are well pubicised in newspapers, on line, on comsumer and other programmes on the radio or television.
It is up to each individual to take sensible precautions to protect themselves in life, whether it is making sure they have house insurance and locking their doors every time they leave the house or of being aware of all the common scams around.
Putting the phone down on cold calls, or checking independently on anyone who says they are ringing from your bank/the police etc., is basic common sense. If the phone call is genuine they will understand your concerns.
Obviously if people have cognitive problems or there is other reasons for them being particularly vulnerable to these scams, the situation is different. But, not many people have that excuse.