Yes, I believe the questions you're asking aren't particularly interesting, or at least you could answer them just as well as any public answer could with approximately 5 minutes of research. And you're not going to get anyone willing to share really anything not already public on these topics. Security work is sensitive.
For example, here are four statements I believe to be true:
1. Google has a track record of transparency when security is compromised.
2. Google has a better-than-average track record of detecting security intrusions.
3. Google is the target of state level actors.
4. Google has not recently publicly acknowledged any successful attacks by state level actors.
From these, one could reasonably conclude that Google is adept at rebuffing nation-state level attacks. Putting specific $$ values on things is a bit reductive, since at some point the weakest link is paying every member of the security team $100 million instead of any form of technical attack.
> If your answer is a $500 Million bug bounty is absurd, you can look at some of my other replies under my original comment for why I believe that is actually too small.
You're making a (fairly common on HN) mistake of assuming that the bug bounty value is going to be anything near the value of the compromise. If I can extract $X from a compromise, I'm not gong to pay you $X, I'm going to pay you $Y, which is less than $X, and probably much less than $X. The market for compromises isn't enormous, so it may not even be possible for you to sell your compromise to anyone but me. So then if you turn to the bug-bounty offering company and try to sell your compromise for $Y, you're committing blackmail, so the companies offer $Z, So yes, I think you have deep misunderstandings of the state of the security industry and those are miscoloring your mental models.
> If it can not be done safely, then it should not be done at all no matter how hard you try if human lives are involved.
This is blatantly ridiculous. Risk can't be fully mitigated, and most systems aren't life critical. You're jumping from "a bank was hacked and people's personal information disclosed" to "this kills those people", which isn't a reasonable jump.
I actually can't believe that someone's response to "are there people capable of speaking on software security" is "we shouldn't attempt to build secure software, because it's too hard".