I think it's irresponsible to avoid thinking about how bad actors might use a technology you've developed.
And is it really unfathomable that the US government could use this sort of thing for evil? I mean, wind back the clock to something like the Red Scare. If they had iPhones back then, they totally would have pressured Apple to add hashes for communist imagery, and use that to persecute people (or worse).
(Before anyone brings this up: I do categorically reject the notion of "that was in the past; that couldn't happen today". If you truly believe that, I have a bridge you might be interested in purchasing...)