Dire Bare
Legend
The Romulans' reclamation of the former Borg appears to be motivated more towards the acquisition and selling of their cybernetic implants than any altruistic feeling towards the organic hosts. Their work here jars with the earlier reference to the Romulans not doing any research into cybernetics (which is highlighted - Narek says the place doesn't feel very Romulan), but then again, perhaps that's why they need so many outside experts.
I might be mis-remembering, but the Zhat Vash have a problem with artificial intelligence . . . . which is not the quite the same thing as cybernetics. Data, and presumably his "daughters", are artificial intelligences. So are the non-sentient synths that went rogue on Mars. Borg, however, are not artificial intelligences, but rather an assimilated hive-mind consciousness that relies heavily on cybernetics. Similar, but not quite the same.
And while the super secret Zhat Vash might be anti-AI . . . that doesn't mean Romulan society as a whole is, or that factions within Romulan society fear AI and/or cybernetics.
And, of course, what we know of the Zhat Vash is highly speculative, Laris and Zhaban are basically recounting myths and rumors to Picard . . . .