I used to work for the two largest theme park companies in the world when I lived in Orlando. Both had excellent inspection, preventative maintenance programs, and operators. Things do go wrong and stress, fatigue, poor engineering happens and things break. I really liked that job, didn't like the heat of central FL.
There is an organization for carnival operators and inspectors, they would have their yearly meetings in central FL and come to our place for a tour. I had considered joining it but didn't need it then so I saved myself the money. They were known to put out recall notices and re-work notices for when a certain type of ride had an issue this way all the other owners could look for the issue and repair it. I can't remember the name of it.
I think we all do the same thing when we go anywhere with exposed welds and structure, check them out, critique them, it's human nature.
Chris