If you came to that conclusion then you have not understood the post.
They lay out a bunch of things to fix about a system that could bring down your browser. What if that system that communication with Google about GCP messed up for them isn't even the IPs you are contacting during unrest in Khazakhstan or an election in Uganda? What if it is a semi-intentionally confused transparent proxy?
Testing a few more things that a friendly proxy may do as it improves your connection is hardly the same as assuming the worst about your network in proper paranoia mode.
They are fixing that thing and all those circumstances and try to make sure that circumstances of that characteristic won't happen again.
The what-ifs you are talking about could just as well be any homepage on the internet.
... and that page could also be MITMed.
So your point is to not have bugs?
I'm the first to agree that it absolutely should be OPT IN and not OPT OUT as it is now, but even so my biggest concerns would not be trying to evade hostile countries. If that is your bar you can't just install a mainstream OS and mainstream software and assume that it is a good idea.