Middle class cars at aimed at different needs than highend cars. A highend car like a Ferrari may aim at image and performance solely and not consider how that car would handle/drive in adverse conditions like snow or concerns for MPG.
Most middle class cars are highly optimized shape wise for MPG as well as handling all types of road and weather which is why tires on performance cars look so different than middle class cars, because their goals are completely different.
Cars like Hyundai are building their own brands based on great technology, reliability, strong MGP etc. If they attempted to simply through that out the window and look like a ferrari, they would lose their core customer base and also not attract ferrari's customer base because they don't want a something lat looks similar on the outside but has lawn mower on the inside.