congratulations, you have now reached a point where understanding people's stats leads to understanding of their tendencies. this is really good and also potentially very profitable (i should know, it seems to be the only way i make any money ever).
you point about the stats not actually meaning much in a vacuum also has some merit. however, after a while you may find yourself buried in data which has not converged yet and is thus unreliable. so you would think you know something, and then it would turn out your knowledge is actually not quite true. it seems you are either prone to over-analysis, or still lacking the experience to synthesize how the different aspects of what you are looking at are actually the same. i am willing to bet that after a while you will grow back to liking the more general stats, even though the specific ones will still be more useful in any particular hand.
i could also make a different argument, but i think i'll leave that to the words of Andrew Seidman, aka BalugaWhale:
The world of online poker has become dominated by statistical analysis programs, hand history recorders and replayers, and HUDs (heads-up displays). For any given sample size of hands, you can find out everything from broad, easily used stats like preflop looseness, preflop raise percentage, and total aggression factor, to extremely specific statistics—fold to river check-raise percentage, etc. Worthless is a little bit too strong of a word, but in my opinion most statistics are extremely unimportant.