At the risk of sounding like a polititician, I agree with both sides in this debate. I tend to pitch rpgs at the level where the players may influence some significant events (but more likely to just be present when History happens), but are not going to discover the meaning of life.
But there is a strong thread in sci-fi where the protagonists do exactly that, change the galaxy and get to re-write the rules. There is also a strong thread of "mysterious, alien, others".
I intend to keep the ancients as mysterious rumours and stories, back ground colour, legends, but I can quite see how other GMs would want to establish a truly epic story, which is surely the point of the "secrets of the ancients", and I agree with them as well.
It very much a YTU / MTU thing, which to me is one of the great strengths of trav.
Egil