A lot of the work a graphic designer produces is never seen. From logos and flyers to letterheads and websites, only one concept will make it through to be seen by the world.
Even when that final concept is chosen, most people don’t realise the hard work that has gone into a single image which may just be a small part of the final design. This can actually be seen as a good thing at times, for example with photo editing. If you can’t tell that the photo has been edited then the work done must have been pretty good but of course no one knows it.