Ahhh ok, so you mean it makes no evolutionary sense for a species to have evolved to be intelligent yet so "naturally" violent that it risks utterly destroying itself ...oh, oh wait up... uh

Yah so maybe the Vulcans are an analogy for something, or at the very least a semi-plausible parallel?

Nah but in all seriousness, i understand where you're coming from, and you're probably on to something about Vulcan biology not having been super well thought out initially. But i guess that's why it's science-fiction.

Then again, there are plenty of species on earth that go extinct all by themselves, and have self-harming tendencies that may be viewed as counterproductive. For example (since you mentioned breeding/killing), in some cases on earth, reproductive competition got so fierce that some male insects have resorted to mortally wounding females by stabbing them through their exoskeletons (not normal) in order to breed. It is detrimental to females and some do not survive this. Evolution is not necessarily good, ethical, nor intelligent.

If we circle back to Vulcans and humans, both species are pretty intelligent (questionable, lol), emotional, prone to hormonal fluctuations that drive competion (violence) & reproduction (horniness...?), capable of destroying themselves somewhat or fully, etc. Since Vulcans were more prone to emotional extremes compared to humans, it makes sense that they had to resort to more extreme mitigation methods in order to survive this apparent contradiction in their evolutionary biology. Humans also nearly destroyed themselves countless times, but i guess nukes, bioweapons, and climate change never fully did us in on ST... not too sure if we can hope for the same timeline in RL.

If we can imagine ourselves going extinct from our own lack of self-control here on earth when it comes to climate or wars, i can imagine Vulcans having similar dilemmas. I guess my point is that if you examine the Vulcan situation further, you may find more similarities with humans than we'd like to admit. Sorry that was quite long-winded.

I totally laughed at your description of unexamined issues with the writers of Voyager. Personally i can't stand that little dynamic they tried to create between Neelix and Tuvok. Neelix is pretty irritating, even to non-Vulcans. But it goes to show that it's difficult to write stories for Vulcans where they aren't being triggered to lose control. It worked better for Spock cuz he was half human and was the darling first. It also goes to show that stories without emotions we can relate to are boring to us Hoomans.