If we (earthlings) were to experience another large coronal mass ejection such was experienced in 1859, it would be catastrophic. I suppose it is one of those things about which it could be said that it is not so much a question of if, but when, it will come. If it came today, it would apparently fry our power and communications grids in such a way that it would take years to recover. Doing without Netflix would be the least of concerns.
Should we be doing what we can to prepare for this? Of course. At the same time, I find resonating with me the observation of Nassim Nicholas Taleb that we can be reasonably certain that some life-changing, earth-shaking event will happen in the lifetime of most of us, we just can’t know what it will be. What we can do is do our best to be prepared for the unexpected. We can also (returning to my own thoughts here) learn to be more comfortable with uncertainty in our lives, especially when the biggest human-made dangers come from those (‘fundamentalists,’ I think, is the term) who insist on being utterly certain about everything.