I'm not super happy with the Web Vitals, either. They seem to be pushing the Web toward deploying a lot of otherwise-unnecessary JavaScript cleverness that ultimately presents itself to me in the form of a generally more obnoxious experience. Older and non-Chrome browsers may have difficulty rendering it. Total bandwidth consumption can go up, because it's A-OK to load a bunch of enormous resources later, just as long as it doesn't happen on initial page load, or take longer than 4 seconds to happen, as measured by the company with the fastest Internet connection in the world.

Long story short, I don't see it as best practices that serve Internet users as a whole. They seem to be more closely tailored to the interests of Google. And, by extension, the subset of netizens from which they can generate the most revenue.