Earlier quoted context omitted.
I think a loss of 100% of one's income is probably a risk so deep into the tails that planning for it is by definition a little stupid. Edit: For a company - apart from Welfare you should have a plan as an individual
Every large company I've worked for has planned for a "zero revenue" scenario. It's hardly stupid.
I was being a little facetious, but the point was more in response to the PC than as a standalone argument.