http://wiki.eveonline.com/en/wiki/Vuld_Haupt#The_Blessing_of_ClonesWhile this is specifically about capsuleers' clones, there's this :
"these pilots [are] especially disposed to the loss of spiritual connection that comes with ohnesh, since they experience death without the subsequent blessing that accompanies it."
I think it's safe to make this generalization, that escaping death through cloning
was frowned upon in the matari culture, probably more in a "poor guy" than "get out of here, freak" way.
Vuld Haupt changed the deal by proposing rituals to repair this disconnection, but :
-Those new rituals can't be older than 10 years : the acceptance of the spiritual status of capsuleers (and therefore, that escaping death through cloning isn't that bad) is still relatively young, and maybe not widespread. Karin Midular could be, spirituality-wise, a member of the old guard (even if she was rather liberal politically-wise).
-The fact that she is a Ray of Matar could be the very reason she doesn't have a backup. A Ray appears in times of trouble, leads, does great things, and dies. An everlasting Ray would be a terrible thing -for the Ray herself and for the people she's supposed to lead.
-And there is, of course, a crapload of personal reasons someone, even given the possibility, would not get a cold-scan backup.