And if the Scriptures had been written in English or said “anoint,” this would be remotely relevant.
Far from reinforcing your point, this drives a dagger into it. The word used in Ps. 23, dissantā, comes from a root meaning “make fat, put fat on.” By contrast, the word used in all of your other examples, Is. 61:3, Ps. 45:7, Ex. 30:25 & 31, and Ps. 89:21, is mashach, which means “to smear, rub with oil, anoint.” Different words, different nuances, different Latin translations (… same English translation? oh well). Looks like the translators of the Latin got it right, and you have gotten it wrong.
If serving as the basis of second-level translations were a major function of the Vulgate, then perhaps so. But then again, it ain’t.