1) Page size alone is not the same as user experience. This is easily explained by youtube or netflix. Videos are tens or hundreds of MBs but start instantly and you get the experience you need. Well made websites follow the same important content, navigation first approach and stream in the rest as necessary.
2) The comparison of page size and how you can fit entire Russian novels in the same size is just weird. The text of the site doesn't add up to megabytes, if it did then it would be an equivalent amount of text as those novels. The fact is that the modern web has lots of visual design and media. Even if you use CSS, people still want images, not just text. That's not a bad thing, it's just an evolution. Even this article has 1MB of images (even as just thumbnails and many not necessary). Whining about images is not helpful.
3) The thing about ad network model is just random and seems like the author has no experience in advertising itself. Either way, talk of bubbles and tracking without actually looking at all the angles and nuances is also not helpful and just derails the topic.
EDIT: author definitely loses some respect for this, I'd expect a legitimate reply: https://twitter.com/baconmeteor/status/683040882757505024