Yes, it IS nasty (not to mention very unprofessional) to deliver unboxed product. What clients do with a product once delivered or picked-up is up to them.
It's MY responsibility to make sure the product is as hygienic as possible, which means boxed (not to mention following HD regulations for food service premises), and the use of ONLY food-safe equipment when making the product.
If I ordered a cake (or any other food product, for that matter) and it was delivered unboxed I would refuse delivery and never order from there again, and never ever recommend the place.
It's up to ME, the professional, to provide the right size and type of box for the product.
Cars are pretty gross, too. It doesn't matter how clean you think your car is - it isn't. Thrre'd always crud floating around in it.
I am constantly amazed at all the different feeble reasons folks come up with in order to justify their unhygienic practices.
For the record, I'm absolutely NOT one of those people who are scared to death of bacteria!
So if you make a 4 tier cake, it's boxed, right? 5 tier, boxed, too? I don't have the resources to deliver cakes like that boxed. You must have two strong men, a big van and a lot of skill getting these cakes in and out of these huge boxes. Good for you. But it's not nasty and you haven't seen my car decked out in white sheets, so you really don't know, do you? But I'm telling you. My car doesn't have "crud" floating around in it. What crud are you even talking about? That's absurd.