I am amazed that people haven't gotten used to these "internal Google doc leaks".

This is just the opinion of some random googler, one among over 100,000.

For some reason random googlers seem like to write random docs on hot topics and share it widely across the company. And someone, among those over 100,000 googlers, ends up "leaking" the opinion of that person to outside Google.

This is more like a blog post of some random dude over the Internet expressing his opinion. The fact that random dude ended up working at Google should not bear much on evaluating the claims in the doc.

A website published that with a title "Google ..." is misleading. The accurate title would be "Some random googler: ..."