Yet you probably let you or your family either drive a car or be in a car driven by others. Perhaps many times a day.
Which has demonstrated the worse safety record?
In most states it is not that difficult to get a driver's license. In a lot of states being able to read, write, or understand English is not a requirement (the English requirement would be discriminatory and is against the law).
My point is there is a whole of things that most people do EVERY. SINGLE. DAY. that is a lot more risky than spending an hour in a duck boat probably in their whole lives.
You've probably ridden in a "friend's" boat that was just as dodgy as the typical duck boat and didn't think twice about it. When you get on the "friends" boat, do you discuss where the life jackets are, how to get out of the boat, what to do in emergency, who is in command when a emergency occurs, etc., before you set off? Every time?
The duck boat drivers and captains are required to meet some standard set by the USCG. How 'bout your "friend"? AFIAK there is no certification requirement that must be met by private or non-commercial boat operators to demonstrate their ability to safely operate boat before they are allowed to carry (non revenue) passengers.