Does that mean I am not capable of making significant contribution to the world of research? No, it does not, but it does mean that there are few open doors fo

Does that mean I am not capable of making significant contribution to the world of research? No, it does not, but it does mean that there are few open doors for you to make contributions to research, and it likely means that it will be hard for you to get up to speed on the current literature, something necessary to make a useful contribution in any scientific field. The list of what you think you are good at does not suggest to me that you would be particularly happy in a research environment. Why do you want to do research? It is possible to come back to university from industry, and I am aware of people who have done good Phds that were grounded in their experience of non-academic problems. One of them had started his Phd with the intention of doing pure research for its high intellectual challenge but realised after less than a year that this motivated him less than he had thought and switched to research relevant to his previous job experience.