This is definitely not true. There is considerable value in advertising, it's just not apparent to you.
In fact - advertising that is 'well targeted' is considerably less annoying than ads that are poorly targetted.
The economic value of a well targeted ad is probably 10x otherwise.
Ergo - unless you are willing to pay for apps - you might now see 10x more ads appearing on pages than otherwise.
The moment you build something, and have to get the word out - your perspective will turn right upside down. As a creator you don't want to bother people who are not interested, but you definitely want to put up ads for those who may be.
A lot of ads are just a waste of time, but there is a lot of efficiency in the communication there and that has value.
The better we are able to connect people with the things they want, the better we all are.
Of course, privacy matters as well, and this presents with a great paradox, in that, losing privacy may not be worth it for some people, but it's surprisingly hard to be objective when we've only been on one side of the fence.