Imagine this: instead of the search engine space being 90% focused on ads and 10% on providing a good search experience, you could have one that is focused on finding the thing you're looking for.
You can have that now if you subscribe to Kagi but it costs money to operate and use. So without advertising you're choosing to make it impossible for poorer people to search.
I don't see that argument having much heft. The people who are worried about their view being soured by billboards aren't the ones who are worried about what happens to poorer people. They move in different circles.