Certainly, your skills provide
a layer of security, ensuring that you don't starve. But once you have this, and it's really not that hard to do once you have a few years in your industry, then you need to start on the next safety net of ensuring you don't get ripped away from your daily routine at a moment's notice.
This is where keeping a finger on what your organization is doing really helps out with. If you can do this well, then you're not just inured to sudden shocks in income, but you can also thrive in uncertainty.
For example, if I caught wind that the company was being reorganized, I'd have a closed-door meeting with my manager to figure out what my exposure was and what opportunities are presented. Perhaps there's a way to help the organization and myself at the same time. Not every such situation has to result in chaos.