Perhaps you do, but it's not going to be the main reason why a diesel car is now avoided: money talks.
Yeah, it's horrible if you get it on your hands or shoes - but if it's a Euro6 diesel using this stuff you'll get diesel mpg but with relatively clean exhaust emissions. Wife just traded in her old 1.5 litre diesel Fiesta (55+mpg) for a 1 litre petrol Fiesta (35mpg in same use). That's a lot of extra fuel for the sake of being 'clean'.
I know of plenty of people who avoid diesel because it is filthy.
Sure it's filthy, but no one really cares about that enough to warrant avoid a diesel. Sales have only dropped now and current owners are now starting to sell purely because of the financial cost of maintenance, rather than the environmental and/or health issues.
"This car runs on filthy fuel but we tone it down a bit by selling you another chemical to spray at the emissions". I would just walk out the showroom.