The way you can test if it's accidental gambling is by answering the following:

If you had worked at a different company with pure cash comp equivalent to your RSUs, would you have invested the same $$ in Google stock? Or would you have invested it instead in an aggressive but diversified portfolio (e.g. 100% S&P 500 or even just a bucket of blue-chip tech stocks).

I am confident that for the vast majority of tech employees they would choose the latter if they were operating in a pure cash regime.