It matters on what you advance in Photoshop, if you a perfect signature maker your whole life, well then your useless.
But if you start doing more things you'll get somewhere.
GUI (Game User Interface) Designer.[This is the styles on the windows that pop up in game, or armor, maters on the engine of the game]
Game Animator [Better to work with 3D programs but Photoshop does help]
All of these require you to have a Photoshop license which you can get somewhere near you (not really near) but you take a Photoshop test and if you pass your certified and businesses see that as a big plus/requirement.