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I'm hoping there's a distinction being made here about advanced knowledge that should be guarded vs the basic education that is expected of most imperial citizens (outside of the niche north korean/space bretonnian Knight agri worlds with their true peasants)
It isn't "how las guns and wheelbarrows are made" we're concerned with, or a database for simple wikipedia type stuff. That sort of thing should just be a given in any number of our hive worlds and factorums where basic civilians should have access to the holonet (think the cyberpunk esque citizens of necromunda). Things like 'how to properly maintain a servitor' or 'how to perform proper maintenance of my implants' or 'how to field repair a common vehicle' should be already accessible.
It's the dangerous stuff. The 'how do I make servitors'/'what's the method of creating clones'/'how to extract rejuvenate'. This sort of thing beyond all the but the bare minimum to comprehension really shouldn't be out on a non-secured database for the masses at all, and really should be on a needs to know basis. Reserved for vetted nobles, factorum foremen, enginseers and the like whether mechanicus or otherwise.
We aren't depriving our average citizens of the basic education of living in an advanced society, just preventing them from making terrible mistakes with dangerous tools and knowledge they shouldn't be playing around with.