The internet is great because it provides a channel for information to cheaply get from creators to consumers at global scale.
Sadly, all of that infrastructure and creation takes time, energy, money, etc. It's not free.
I don't take it for granted that advertising is the only way there can be an internet. I'm pretty confident that if everyone starts using adblockers, the internet will continue to exist. But will it be the internet I want?
The internet that gives me Netflix and Amazon Prime I can take or leave. The internet that gives me endless blog posts, reviews, and Q&A sites I can take or leave.
The internet that gives me API documentation, etc., chat, email, and Wikipedia I will fight for. I will pay for it. I will pay higher taxes for it. The rest I just don't care that much about, and I really doubt that many other people do either.