Yeah - because not being content with having to not pay for something, they want to remove the best method for the people making the content to get paid for doing so. It's always someone else's fault, though.
I've mixed feelings about this. Even the website that relies most heavily on embedded ads, YouTube, has been losing money for years. Even worse, the content they've elected to subsidize heaviest, while undeniably popular, is of mixed quality and frequently is actively harmful.
So you're not producing harmful content, but still the server costs and miscellaneous production costs force you to seek revenue. Mostly this is going to be through a contract with an advertising network that essentially hires space on your server and pays you, perhaps by the click-through rate. This is where it gets gnarly for those who seek out your content. The current state of the art is rather desperate because the advertising networks have not acted in a trustworthy manner, sometimes delivering harmful content to those who visit websites, sometimes even injecting malware into computers. As a website owner you desperately need the revenue, but at the same time you must understand that the people who come for your content must also be curated. You have a duty of care. Perhaps many website owners are diligent in sticking only to ethical advertising networks, but the overall environment is one in which only a fool would trust any given website to keep the harmful stuff away.
I know, Patreon-style sponsorship is difficult to build, and clearly some people are not producing the kind of original content that can be financed in this way. They end up with a failing website that bleeds money. Nobody told you this would happen, so you blame the freeloaders who use your bandwidth without any intention of contributing. But they're not the problem, they're just a consequence of the irresponsible exploitation of desperate website owners by unscrupulous advertisers.