Letting one of the most basic of errors slip through proves that the currently existing system has failed. There is no way around it. The current safety standards are the result of past behavior and will not continue with the current system.

Making sure bolts are installed is the most basic of basic things. If that can fail, many, many far more complex and involved problems are also failing. If you understand how safety in aviation works you would understand that this slipping through can only happen if many, many more things are also slipping through. Things which are far harder to inspect and to verify to assure flight safety.