The Purpose is to educate those that might not be knowledgeable in this convention.

I always look at it as if the car were an extension of me, whilst sitting in the driver's seat.

I sold a "Left" hood hinge on eBay, only to get an email stating the buyer needed the "Passenger side" hood hinge. I used to have a problem figuring out which side is which, until I started looking at it as if I were sitting in the Driver's seat. Another Good aspect of my approach is that it works for both US and UK type cars. AND my approach also can be used for front/rear, so it's basically 100% accurate 100% of the time.

Marty