It's a case of reduced visibilty (high/low and left/right and in the mirrors) for 'style's sake', IMO. So, the driver and/or the drivers of vehicles, riders of scooters or motorcycles overtaking or being overtaken have to compensate for these increased blind spots, if they have the wit to understand. :noidea:
It's the same sort of thing as all these huge MPVs and 'SUVs' and the like, a massive visual block when in front, whereas you can usually see 'through' a normal car/estate, to a certain extent.