I'm a grown adult who is perfectly capable of maintaining a savings account and investing in a network of peers who I could ask for help with acquiring another job. Why should that be my employer's responsibility?
Lots of "perfectly capable of adults" maintain a savings account and cultivate a network they think can fall back on in hard times. Far fewer than you think are able to save enough or have that network come through. In fact, assuming one's savings account is large enough, or one's network is strong enough, is an assumption born of privilege few, even in America, ever know.
That is demonstrably insufficient. From the article: "I was a volunteer firefighter, I coached football and baseball, I was saving my money, doing everything you're supposed to do". This guy had tons of contacts and a savings account, and he ended up homeless.