do rural Haitians care about the capital being wiped out?

the vast majority of their population seem to live in villages and practice subsistence agriculture. So it’s not like they are losing jobs or not getting access to vital government services because there is no more government (if there ever was one in the first place).

So could it be that the earthquake disaster is simply not relevant to the vast majority of Haitians in the present and has zero bearing to their long term future (of being same old, same old subsistence agricultural society) as well?

I don’t think Port-au-Prince is as small a minority of the populace as all that.

In general, massive disaster in a metropolis is rough on the countryside. You’re losing business, directly or indirectly. You may be taking in refugees.