It has support fror Shader 3.0. If it didn’t have it, the game would run in a blank screen.
I know that because I have an old PC with a radeon 9600 pro that doesn’t support it and the game runs only with sound, no image.
Yes it’s 2009, but some companys like Blizzard makes game that runs on all kinds of computers. If anything, it’s more people buying the game