Nickpicky are you, you forgot to add when a herald becomes a Lord, what are his duties.Maybe you'd better hush up then? A herald is like a diplomat, an ambassador - the sort of guy you send out under a flag of truce to negotiate, not someone who's involved in the fighting.
Wisdom and action are not divorced, you fail to see that a wise man can be also a Hero.Why, just because PJ decided to turn him into an action hero? There's nothing in the books to make him an exception.
Part of been a Lord is been responsible for the people you are leading, he doesn't need his sons to do his job, they can also take their own action in different places.He'd thrown his lot in with the Elves, that means he's counted as one wherever that matters. And in the books he had Glorfindel, Elladan and Elrohir (plus others!) to go out and kick butt on his behalf. Elrond's a scholar, first and foremost. Use your brain and try to think past the movies.
Elrond is an extraordinary character, you trying to classify him as an ordinary elf is not right like it or not, PJ was right on the nail on this one.I'm not talking about Elf-lords in general, I'm talking about Elrond in particular, and you've got nothing except PJ's nonsense to go on.