By refusing cookies, you restrict the use of certain things. Some uses are unavoidable, however, and there will also be a request for consent to use the information for targeted advertising, for example.
One of my concerns is that these choices are not always easy to make. The simplest choice is to accept everything. However, I would like the choice to refuse everything to be much simpler and more accessible. Often, you have to go through two or three other levels to get there, and even then, you have to provide details. On the other hand, the option of accepting everything is always there.
In my opinion, there is still work to be done here.