I'm at a VC-funded, private company (too mature and big to be a "startup" anymore). I hear my coworkers talk about how we're all safe because the company won't go away and is profitable, but that's not always how it works.
Very few jobs are truly secure ever. Your company can avoid being impacted by the macroeconomic situation of a particular recession or financial crisis, but that doesn't mean you won't be fired or laid off or need to quit your job, then find a new one in a less than great job market.
I've been through layoffs at more economically sound companies where the leadership decided something had to be done to mollify shareholder anxiety about the larger economic situation. I've been through layoffs at companies where the writing was on the wall (especially in retrospect).
I worked with somebody who developed a major health problem during our time as coworkers. He had to quit because he couldn't do the work until that was squared away. It took him years to be well enough to work again, and by then he needed to live near family in a lower wage/higher cost of living area that still scrambled his financial plans.
Most of us have worked at a company where a new boss came in, and some people just didn't get along with them or didn't see eye-to-eye on whatever or otherwise couldn't work there anymore. Or where there's a reorg and suddenly the work isn't a match anymore.
Everyone should be prepared at any time. If fear of recession gets folks thinking about that, great. But they should do it regardless.