Those events are smaller-scale events, and look at the disruption they produced.
The only big one we have yet had is Lehman, which led to a global financial crisis that we haven't gotten out of, and that we won't get out of. We have thrown money at the problem, but all that has done has been to devalue money--the underlying problem persists, worse now than in 2008 because everybody has had to debt-finance the "fix".
Everybody is much deeper in "debt" now, but there has not been any actual solution of "the problem". US federal government representatives are at this moment meeting with banks around the world to try to agree upon an actual solution, knowing full well that we are still right in the middle of "the problem".
This is the only problem that we haven't gotten out of--all the rest that you address were lesser problems, but they still haven't achieved any actual solution either--look at Fukushima. It wasn't large-scale, but within its area of impact, essentially nothing has been addressed.
Nations now use debt not to finance investment aimed at future return, but instead to compensate for inefficient cash flow management that is insufficient to compensate losses due to waste, fraud, abuse, and decay. I analogize it to a person who is living beyond their means using a credit card to fund essential purchases, versus a loan enabling capital improvements aimed at increasing productivity.
In all those other systems--telecom, electricity, fuel, delivery systems--there are physical realities that must be maintained, unlike the Lehman situation. We have seen relatively minor events, but even those haven't been rectified, and the affected areas and populations haven't recovered, be it Fukushima or New Orleans.
The fundamental soundness of investing in a publicly-held entity via securities traded on an exchange is dependent on so many things it makes your head spin. There are too many variables, and essentially no control, versus for instance the extreme example of farming a small plot of land and trading the produce, or setting up any other type of small private business that supplies an essential service to a local customer base.
When a major event comes, I think we will see fragmentation as a necessary response, which I think might be a good thing, leading to both regionalization and a certain degree of redundancy, but mostly to options that are somewhat insulated from each other.
Financially, things are going the other way, which is unfortunate. Just look at FATCA--the whole world is on board, some with reciprocal IGA's, some with non-reciprocal--but everybody is playing the same game. There is no more national independence, everybody who knows will tell you that everything has fundamentally changed and that the old way of doing business (independently) is now gone. Look at BRIC's attempt to find a viable alternative to the US dollar--totally fizzled.
Because these things are fake--the dollar and regulation--they can be changed by governmental fiat. However, that takes time, not only for the initial decision, but also to set up an alternative, and to get it working. That's that 5-10 year timeframe I'm talking about, likely closer to 10 IMHO.
I think the solution is to find a way to develop very regionalized productive or distributive capacity for something essential, close to a market that will be large enough to keep you afloat, and that has something that you will want or need, and potentially to invest in local/regional strategic partners, where you can take "security" that is actually "secure"--unlike the guarantees afforded by the markets and publicly-traded companies.