Ear Cropping is so common in the US that there are genuinely some people who do not realise the cropped look is not natural!
I realise its a cartoon but - did you realise Scooby Doo is a great dane with cropped ears?! That normalisation for you.
My job means I talk to puppy owners around the world so this comes up fairly often - many people buy a puppy from a breeder who crops, and its not optional, if you want that puppy, it comes cropped or you don't get it.
For those that have never seen an adult with natural ears, and buying from breeders where you never get to meet the puppy, it is shipped to you (again very common in the US), many do not realise they could ask before cropping is done, or find a breeder who does not crop.
Of those who do realise its something done to the puppy, and is optional, they're told that it is necessary - to show, a natural dog will not win against cropped dogs - that its necessary for health, floppy ears supposedly being prone to infection more than upright ears... they're even told it improves hearing!
Fighting against tradition and bullshit about health, is hard - and because vets are doing it... it must be ok, if it was cruel, vets wouldn't do it, right?
It is slowly becoming less popular amongst pet owners of non-macho breeds (Schnauzers, Danes, Boxers, Griffon Bruxellois, Beauceron, Miniature Pinscher, Boston Terrier) and more US vets are refusing to do it, but that is a dilemma for them as if they refuse, they KNOW people will get it done elsewhere and may choose a non qualified person to do it illegally...