Earlier quoted context omitted.
You don't need luck though, even with no stock appreciation at all you make over $300k a year as a senior engineer at Google. The high salaries you see are mostly without extreme stock value changes.
> without extreme stock value changes. That's the point, you don't know whether there will be any. So they are definitely not "as good as cash". Just because they aren't lottery tickets doesn't mean they are equivalent to cash.
Edit: Just to clarify, $300k as a senior engineer is without any stock appreciation at all. I made $250k as one step below senior without any stock appreciation at all. My point about significant stock changes is for significant stock changes downwards, meaning if the Google stock somehow lost 50% of their value or something like that.