Modern safety analysis acknowledges that humans are fallible, and they are generally acting in a good faith way to try and do their jobs correctly within a given system they are operating in.
That's why these reports tend to suggest corrective actions to the parts of the system that didn't work properly. Even in a perfectly functioning safety culture, an employee can make a mistake and forget to install the bolts. A functioning safety system has safeguards in place to ensure that mistake is found and corrected.
Super underrated point - and one that I am not sure the general public always keeps top-of-mind, as human imperfection should be the default assumption. The whole system of air travel is designed so that wherever possible, multiple f*ck-ups can occur and not result in a catastrophe. The success of people involved with anything touching on aviation safety is best measured as in "how many f*ck-ups can occur in the same episode and have everyone still walk away alive?" If you can get that number up to 3, 4 complete idiotic screw-ups one after the other, and the people still live, you've really achieved something great.
That's why these reports tend to suggest corrective actions to the parts of the system that didn't work properly. Even in a perfectly functioning safety culture, an employee can make a mistake and forget to install the bolts. A functioning safety system has safeguards in place to ensure that mistake is found and corrected.