Earlier quoted context omitted.
Bad things happened because tool, tool bad , very good argument. Put yourself in the mind of someone making a THING, how do you plan to reach your possible customers for THING? THING is the best in class, better than the competition but how would you make the world aware of THING existing?
how did this happen before advertising? trade shows, trade magazines, word of mouth, window-dressing in the THING-quarter, ... why are personalized ads on a website indispensable?
They aren't. This is exactly what I mean by modern advertising.
If ads were just contextual based on the content of the page, we wouldn't be having this conversation.