Do you mean the driver side blind spot? The one on the passenger side is real depending on the size of your vehicle. I drive trucks and while it’s not quite as big as this shows there definitely is a blind spot where I cannot see the car that’s level with my door. A pickup can generally be seen

Edit: I looked closer and just realized he is driving on the wrong side this isn’t OK

So ya you are mostly correct there is a small blind spot drivers side but not that big