Which makes sense, there is only so much you can do with loudspeakers to affect the perceived location, you don't really know where the loudspeakers and the listener are located relative to each other.
In the case of gamers, they are usually centered relative to the loudspeakers, and usually the loudspeakers tend to be placed symmetrical to the computer screen, so the problem is not so bad.
For cinema viewers sitting in the cinema the problem is much worse, most of the audience is off center... That is why 7.1 has a center loudspeakers, the dialogue is sent directly there to make sure that at least the dialogue comes the right direction.