I work for Google and I used to have this exact thought too. I think the reality is not quite as rosy, though far from bad!
You have to realize that there are hundreds of people who work on systems like this, and as a consequence, your day to day work is more or less the same as what you would do on systems of a smaller scale.
Before I joined Google I always wondered what things they did differently and what magical knowledge Googlers must have possessed. After joining I realized that while on average the engineers are definitely more capable than other places I've worked, there's no special wisdom and instead they just have more powerful primitives/tools to work with.
Of course, maybe I am mistaken and just don't know of the magic?