Targeted ads gave us none of the things you mentioned, it merely gave them highly-effective ad targeting. But a company can still buy TV ad spots, they can still spread via word-of-mouth or grassroots campaigns, they can still hire people to canvas and pitch, nowadays they can still go viral.
I agree with GP that ads are manipulation, and that we cannot give ad people (or any people, really) tools that are too good in this area.
Literally every big company in existence today started small, disrupting or innovating or just effectively competing at something. Yet somehow they managed to become what they are without targeted advertising?
User tracking is absolutely despicable and must be killed.
Okay, I'm sure they used some of them as well, but that was not their primary advertising mechanic to get the first 1,000,000 signups.
Killing targeted ads will just mean the incumbents will dominate and without competition, consumer prices will rise. Gillette did their first price reduction because of dollar shave club is an example.