And it probably would be unusual for them to have absolutely no skill in them whatsoever, but it would not be unusual for them to not be competent enough for it to warrant them having the talent. I probably answered in a roundabout way, but that’s what I was getting at.
You also have the game mechanics side of things where a character (e.g., Tuvok) has been shown to know and use the Nerve Pinch technique, but as his Security is higher than his Science and Medicine, the talent would be of limited mechanical use compared to just using a standard unarmed attack (although Nerve Pinch would provide Intense).
Honestly, I just brought up the TAS reference to counter the “children are forbidden to learn the nerve pinch” reference from the Discovery comic. My personal stance is much like yours.
Is it unusual in the 21st century for someone to not know karate or judo? That is the type of skill I would compare the Vulcan nerve pinch to personally. I would however counter that arguement by suggesting that most military personnel would probably learn and develop some form of martial art/personal combat skills, which is why the nerve pinch is so common amongst Starfleet officers.
The mind meld is an even more complex and controlled skill, and therefore one that I would argue to take many years to master. A skill akin to carpentry perhaps, that is obviously useful, but not necessarily widely studied?
Such a view would be illogical.
We are also presuming that all of Vulcan has the same ideals, perhaps in one town, state, country, side of the world views children learning such things as inappropriate and the other side does not.