A big problem that the web has is that it has no standard for micro-transactions. As such, the web is powered by ads or subscriptions. That's a fact.
Of course, we can talk about the "indie web", the one in which enthusiasts often get overworked without pay, and then have to provide support for free to entitled users, while begging for donations to keep the servers alive (e.g., Mastodon, etc). But IMO that's not sustainable. Servers, electricity, people’s time aren't free.
If ads go away, large portions of the web will be locked behind paywalls. You could say that's not your problem, however, you're a privileged individual that can probably afford to pay for YouTube or whatever else you need, whereas the poor can't afford it.
Ads going away also means that your average online publication can only survive if subsidized by a bigger player, like Facebook. Especially smaller newspapers, as there is only one NY Times and subscriptions fatigue is real.
People that want to ban advertisements are basically the NIMBYs of the online world. Fact of the matter is that absolutely all browsers are funded directly by ads, including Safari and Firefox (both funded by Google actually). Brave Software had the audacity to speak against the Topics API, while having plans to also do client-side targeting, but in a way that keeps the results under Brave's lock (data for me but not for thee). Vivaldi spoke against the Topics API while defaulting to Bing and encouraging users to not block ads from their partners. I vaguely remembered that even Firefox flirted with client-side ads in the new-tab page.
The Internet needs valid business models. Wanting ads to go away is like wanting capitalism to go away. And the people proposing it have no better solutions than having the government subsidize it all or just letting it crash and burn.