It sounds like this is the bit here. Big websites have revenue needs to switch to AMP, since Google prioritizes them in search. WordPress blogs are most of the content that doesn't need to. But if Google can push AMP down the default install path for a WordPress blog, they manage to swallow the largest segment of content they aren't currently drawing in through other means.

Agreed. Google seem to be very siloed internally. That manifests itself in confusing narratives like pushing PWAs (web) and Instant Apps (Java) simultaneously, or supporting both Chrome OS and Android.

So instead of asking how this is good for Google as a company, you have to look at whether it's good for a single project within Google. PWAs and AMP seem like the most likely candidates.

My initial thought was that blogs tend to be funded by ads. So more blog = more ads.

What I want to know is why more blogs aren’t don’t resort to mining crypto using their users browser. It can be light weight and less intrusive than an add and you still get paid while embracing the future.