You're basically saying you don't understand probability lol. The probability of Google going under is less than the probability of some random startup. If you disagree with that premise then we're at such fundamentally different points of view there's no point discussing further
While your job at Meta might go away its much less likely to go away than a job at Sliceline.
There is risk with all jobs but how many mass layoffs of eng have FAANG companies done in the last ten years? How many start ups have shut down in the last 10 years?
Because in startups, it is not just that a job goes away - the entire company is more likely to go away.
It might have found funding before fit, leading to the market never materializing. The leaders may not have enough experience to see the path before them while at the same time the VCs push for high-risk moves to drive their returns instead of making moves to ensure business stability.
Fundamentally, startups do not share the goal of a long-term sustainable growth pattern. They shoot for the stars, and either make it or crash.
....and how is that different for you? You can only lose one job at a time, regardless of how it happens.
Here's my other buffer against job loss: I consult in between jobs, sometimes for years. In fact I think of it the other way: I'm a consultant that occasionally takes a job for variety.
That's risk. The difference is that you're comfortable with the risk, but it is risk.