Yes I know they are the Google servers. Google are subpoenaed for those logs so often it’s easier for them to just co-locate government assets.
I think it’s OK to use normal DNS service, except in certain countries during times of information clamp down. This is obviously when free information might be most valuable so it makes sense to have resilience against the kinds of oppression that we all have seen before.
For me the big challenge with the Anycast isn’t the technical aspects, it’s how to do it without single entity ownership?