> have gigantic well-funded security teams triple-checking what they do
Yes! This is the answer to almost every "Well, it works for Google..." that comes up.
Alice: "It works for Google!"
Bob: "Sure, but how many PhDs does Google have on payroll managing it?"
Google has the resources, meaning dollars and reputation, that if they want to do something, they can hire anyone they want to make it possible. They frequently hire the authors of the programming languages and environments they use (that weren't already invented in-house), who can then customize everything to fit Google's needs just so.
Assuming you're a normal mortal corporation, getting the inventors of your platforms on board and committed to your problems specifically is no trivial matter, and you don't have an army of bona fide, credentialed computer scientists on payroll to patch any intervening rough spots, so "Google does it" is not really applicable.