You're not wrong, but you think too small. Ads existed well before the internet, and are so ingrained in the world at large that as a thought experiment this is

You're not wrong, but you think too small. Ads existed well before the internet, and are so ingrained in the world at large that as a thought experiment this is up there with "what would we miss if we removed the concept of murder/books/good/etc. entirely". What does "the concept of ads" mean? Is it advertising if I say "I bought a really great hammer from place, you should also get one if you want a great hammer" to a friend? I literally cannot think of a world in which you can only remove ads and not blow up literally every paradigm of how we deal with resources and their distribution.