The internet failing kinda sucks, but thats what a charged kindle is for.
I don't know about you, but for me the vast majority of possible disaster situations would not include fleeing my home and city.
Local disaster (e.g. fire) would flee my home but use city services. Regional disaster (e.g. blizzard, civil unrest) would involve staying at home for the protection / amenities it provides.
Personally, I think fleeing to the wilderness is an anti-pattern and I have not seen a situation for me that would necessitate it besides the end of the world as we know it (e.g. nuclear war), but IMO that moves into "some prepper crap" territory.
If you live in a region with seismic activity, earthquake preparedness might necessitate a bugout bag, but that's hardly 'everyone'.
Civil Unrest/War can also lead to folks fleeing their homes- see the massive numbers of refugees fleeing warzones. Staying in your home in such a situation may not be the wisest course of action.
Earthquakes as you mentioned can be another cause- also, tornados- but tornadoes are usually fairly localized.
I don't know how many of the other ones realistically call for a bugout bag. Big storms have days advance warning - you don't need to be ready to leave at a moments notice, you need to decide days beforehand whether you're evacuating or boarding up your windows. Most civil unrest does not warrant evacuation in the United States, and if it got to that point, it would probably not be a sudden and unexpected departure.
Maybe I should clarify: In my previous post I wasn't so much against the idea that someone should need to possibly evacuate, as that you need to prepare to make a sudden and unexpected evacuation from society as a whole (like a "take the bugout bag and make a run to the woods" situation)
As for big storms- ideally, yeah, but it seems that a lot of folks try to ride it out, it ends up being worse than they expected, they get flooded out, and now have to be evacuated in a hurry.