Who doesn't know what Coca-Cola is? Who doesn't know what a Macbook is? Who doesn't know what Disney is? Who doesn't know that Ford makes trucks? Who doesn't know that Budweiser makes beer?
You have a theoretical justification for advertisement. If you actually switch on your TV, you will see almost entirely advertisements for products you already know of that are making a purely emotional appeal.
Look at these companies:
https://www.businessinsider.com/10-biggest-advertising-spend...
Every company is a household name.
Look at these ads:
https://www.adsoftheworld.com/collection/2018_super_bowl_com...
How many of them inform you of something you've never heard of? How many of them make a logical argument rather than just baffling you with bullshit?