No, he's basically correct unless the game has horrible PvP balance where a single class can do insane AoE damage *cough BW* and theres another class with some completely broken blackhole AoE CC *cough Engi*.
Then sure, 2-3 broken BWs with some Engi support can take out a group of idiots 10x their size and bunched up together... which is unavoidable in Keep warfare...
Or you can take a less broken AoE class, combine it with ****** rendering/visuals/clipping and drop stacks of basically invisible black pits of doom on some stairs and take out waves of people that way.
But you'd be a fool to try to pass any of that off as real skill and not the exploration of ****** game mechanics implemented by pigheaded, moronic developers.
This game doesn't have Keeps, it doesn't have a broken godlike AoE class... and while the CC is a bit ridiculous, its pretty much all single target. Its "open world" is all instanced too... which makes all of this a moot point because there will never be an epic 100v200 battle in TOR unless the devs change something in the future.