Regardless of your pay grade. Regardless of your knowledge for the position you have been hired for. You should care enough about yourself as an individual to provide the absolute best service that you can provide. I know a few people if any who are employed in a field they know absolutely nothing about. Perhaps that is the case but there is at least an interest that led them to apply for those positions to begin with. If I were working within an industry that I am unfamiliar with I would take it upon myself in my free time to learn as much about it as I can as I am being paid to provide services.