Actually, it's because marketing departments rely heavily on tracking cookies and pixels to be their job, as their job is measured on things like conversations and understanding how effective their ad spend is.
The regulations came along, but nobody told marketing how to do their job without the cookies, so every business site keeps doing the same thing they were doing, but with a cookie banner that is hopefully obtrusive enough that users just click through it.
The regulations came along, but nobody told marketing how to do their job without the cookies, so every business site keeps doing the same thing they were doing, but with a cookie banner that is hopefully obtrusive enough that users just click through it.