It didn't come across as that, but I do know what you mean. When I'm in an ordinary car and there is a bigger vehicle next to me, it can make seeing where I've reversing quite difficult. It's not worth worrying about tho'. It's times like that when we need to rely on the observations and consideration of other drivers that who would see you edging out, realise that you can't see, and give you enough time and space. That rarely happens tho'. Most people don't realise that there is a lot more to driving than just being able to make a vehicle move.