I’m pretty sure that most TL 10 (or at least TL 12) Imperial/anti-psion societies have more sophisticated ways to create a lobotomy… but maybe not, if the Referee wants all lobotomies to destroy the victim’s emotions/personality.
But in the Imperial Empty Quarter, a lot of societies lean low-tech. But hey – at least a lobotomy is better than the “burn the witch” school of thought, common in many (most?) of the more rural communities.
What PCs really need to keep an eye on is the ‘kill the outsider’ villages. True: many of them lack high-tech weaponry. But not all: and many low-tech openly violent tribes have kinsmen on the high-tech cities.
For example, the PCs have finished a few money transactions and are in an elevator, when a walking tent who may or may not be carrying 50 pounds of explosives slips in just before the door closes…