Actually that analogy doesn't hold up all that well. In Star Trek, the Prime Directive applies to populations which have not yet invented the warp drive. Since the gorillas have already shown themselves capable of dismantling snares on their own, they've essentially demonstrated a development level that would make it OK to share "snare dismantling technology" with them.
(Wohoo, Star Trek discussion! On a completely unrelated note: Today sees the US release of Star Trek: TNG season 1 on Blu-ray, which is the result of a remastering effort of unprecedented scale, going back to the original film negatives of live action and VFX elements and essentially repeating most of the post-production process using modern technology - compositing, editing, the works. They've spent a double-digit amount of millions of US dollars remastering season 1 alone, and have dozens of people working in three shifts 24/7 to complete two seasons per year, including several veterans of the original crew. The effect is something as if you had to watch the show through a sheet of smoked, colored glass up to now, when someone has finally taken it away.)
There's a danger in taking Star Trek too literally; they often break their own rules in order to suit the needs of their plots. That said...
The warp drive rule was a threshold thing. Before a civilization reaches warp drive, they're not supposed to receive any help at all, even with technologies that they've discovered. Once they reach warp drive, then it's time to make first contact and start to tell them about the galactic birds and bees.
Warp drive is a beautifully natural threshold within the Star Trek universe. Unfortunately, in our world today, we don't always have nice boundaries like that. Is trap-disarming for gorillas a threshold event analogous to warp drive, or is it more like a significant but ultimately incremental step in a long journey? I don't think there are any easy answers.
(Wohoo, Star Trek discussion! On a completely unrelated note: Today sees the US release of Star Trek: TNG season 1 on Blu-ray, which is the result of a remastering effort of unprecedented scale, going back to the original film negatives of live action and VFX elements and essentially repeating most of the post-production process using modern technology - compositing, editing, the works. They've spent a double-digit amount of millions of US dollars remastering season 1 alone, and have dozens of people working in three shifts 24/7 to complete two seasons per year, including several veterans of the original crew. The effect is something as if you had to watch the show through a sheet of smoked, colored glass up to now, when someone has finally taken it away.)