If someone has not asked all stakeholders to identify potential risks then their project could be have a disadvantage. They would only have the points of view of engineers and others on the project team. In order to try and supplement the points of view they don’t have would be to conduct substantial due diligence to find similar aspects and figure out the risks that were present when those projects were being completed. You could also look at past projects that your company has done and see if risks that have happened in previous projects could occur with what you’re working on. This way you could look at more detailed reports and could try and prevent them before they happen. It would be best to try and involve stakeholders and get as many points of view as you can but if not you might have to continue on and deal with the risks and vulnerabilities as they come.