The reason to have guaranteed severance for a long-ish time (3 months or so) is to soften your landing when the market/economy does not guarantee you a more well-paid job within that time. We might be entering one of those times, we might not, either way you should be prepared for it. If your employer has already made sure that you are prepared for it then that is less stress for you, which is good for everyone. It also means more predictable (although maybe higher) costs for the employer, which is usually good for them too.

It seems like tech-workers assume that things will always be easy on them when history clearly doesn't bear that out.