Rooftop solar with storage and a grid disconnect is fine. The problem comes about when people expect the grid to be there during the 5% event but otherwise be free (or even worse, that the utility be required to pay them for low-value power that overloads puny distribution systems during undesirable generation hours. It's a matter of economics - centralized generation, transmission, and distribution is expensive. Someone's got to pay for it if we want it to exist. A lot of people crow about their great solar setup and don't talk much about the power that they pull from the boring old grid.

If we're ok with everyone being an island or building a system capable of massively distributed generation, great. It will be massively more complex, less efficient, and more expensive to maintain. Let's just be honest about the nature of the problem.