I have chronic low back issues. I run a lot of spacer on my C-50 Colnago to avoid hurting, having my left leg go numb, and to keep me riding.
When I had Roland DS build a steel bike for me a couple of years ago, he cloned the C-50 geometry at my request and put the extension on the head tube to minimize the spacer stack. I like it. I feel good on it. I do not hurt and my leg does not go numb. Thus, I ride more because of it.
If someone does not like the look of it on their bikes, they are free not use it. If a person does not like it on someone else's bike, they probably ought to just keep it to themselves....
Tucson, Baja AZ