So I'm supposed to keep a mental database of all the sites I might visit, and whether their ads, pushy JS popups, autoplay videos, and other crap are too heavy for my taste? And consult that database every time I see an interesting-sounding headline on facebook or twitter or my news app, before I click on the link? If it's a site I've never visited, how do I even know whether the UX will be acceptable to me before I click?
I admit I do keep track of a handful of bad offenders in my head, but I really shouldn't have to do that. Sure, it would be better if there was a trusted decentralized system to enforce rules and guarantee a decent UX, perhaps with more granularity so people could set different acceptable points, but until that exists, of course I'm going to use the presence of an instant articles or AMP icon to guide my browsing.