In the advertising world, there are roughly speaking two major objectives:

- Creative: also known as "brand awareness". Keep the given brand top-of-mind for as many prospects as possible. The hope is that they will then choose products under the given brand at some future opportunity. This is the type of advertising that Coke ads are. They aren't attempting to get you to buy a Coke right now; they are trying to brand "buy coke, it makes you happy" on your brain.

- Directional. These ads are trying to get you to do something as soon as possible. One obvious example is the annoying "you just looked at this thing, still want to buy it?" ads that follow us all around online. Presumably these ads are somewhat effective, otherwise they wouldn't exist.

From this perspective, removing attribution barely effects creative advertising. On the other hand, it is obviously quite destructive for directional ads. Whether this is a good thing is arguable; I personally find the desired objective of "creative" advertising to be more disturbing.