Hmm, I’m not sure I buy your contention. You can point to an individual instance of applying a specific technology and say “it is an extension of a particular human intention”, sure. But this is not commutative; Person A’s application of Technology X to Situation 1 is “extension of human intention”, but to Person B who is also in Situation 1, Technology X is “counter force in opposition to (Person B’s) humanity”. See for instance social media recommendation algorithms. I know a girl who can’t use TikTok because she loves pets and can’t look away from families grieving their pets - even starting from a blank slate, the algorithm quickly detects that grief videos engage her, and so inevitably fills up her feed with dead dogs. She absolutely experiences this particular technology as a distinct, and distinctly anti-human, counter force.
Even if every instance of technology has its origins as an extension of human intention, it is still valid to look at the unintended consequences that are anti-humanity, and it is valid to filter for just these negative experiences and say “technology is a counter force”.
That’s not disagreeing with your contention that it is an extension, by the way - it’s saying “also”.
It’s been a long time since I read Kaczynski’s manifesto and I only skimmed it at the time, so I can’t recall whether he makes this claim, or whether I had this thought myself as an obvious patch to his claims. But I think he did say this.