Yeah, I know how fast things can change.
My father got sick and died last fall. For that whole time period, my bank account (which had been monotonically increasing since I got my job) just stayed flat and even decreased a bit. Airline tickets are remarkably expensive when you're flying between coasts every couple of weeks and often don't know the days when you'll need to jet out. Plus I wasn't working for much of that period; I'm lucky that my employer has a generous family leave policy that continues to pay, though at a reduced salary.
The point of this thread, though, is that what could've been a financial disaster was merely a financial inconvenience. I was set back by roughly a quarter financially; big whoop. If I'd been living paycheck-to-paycheck, I'd have to dig myself out of debt for a while afterwards, or worse, wouldn't have been able to go home when my family needed me.
That's the type of security I'm talking about here. For many people in America, a family medical emergency means that they're screwed. Their life completely comes apart, and if they ever manage to dig their way out, it can take decades. That's not the case - or shouldn't be the case - for most people working in technology, where most jobs come with health insurance and salaries are well above the median. You can cover the vast majority of emergencies with a few tens of thousands in the bank, and knowing that you have the security of being able to do so is often worth a lot more than other uses for those few tens of thousands.