Are they? Their FWD cars sell like hotcakes, and I honestly doubt 99% of their customers notice or care what kind of drivetrain runs the car. I'd like to think I'm a petrolhead and I'm constantly shocked by how little people know about the cars they buy. It's a miracle they manage to remember if the car takes petrol or diesel, honestly. Most of my friends bought their cars without doing any sort of research - it was a matter of picking one that looked most interesting + the config was within their price range, engine type/drive train be damned. The pinacle of this is a guy I know who has a GLE63S, so I thought it would be super cool to talk to him about the hand-built V8 in his car - his reaction was literally "custom built....what?". He bought it because he likes the look and the sound(and he's rich enough to afford it), but I wouldn't be surprised if he didn't know that his car is 4 wheel drive for instance.
People generally don't care.