Meta players are going to speak as meta player and rogue players are going to speak as rogue players.
How do players who play both meta and rogue speak?
I myself usually just stick to metagame decks nowadays, as I don't have the time to test so many different decks to come up with a rogue good enough to get me anywhere.
From a competetive point of view, meta is played because it is better than other decks, and rogue is played because it has the element of surprise on its side. They usually somehow counter the meta decks that are up right then.
But if everyone played rogue, rogue decks wouldn't have anything to counter. They would also lose some of the surprise, since decks would be geared towards having good matchups against everything.Since this is impossible, they would just try to fulfill their main strategies best as they can. Then, when someone comes up with a deck that has the best main strategy, it would consistently win. The guy with the best deck would just continue winning until everyone started countering that deck. Now, if everyone had a different counters, most of them would be bad (maybe two people would come up with a deck that worked right), and the guy with the best deck would still continue winning. The only difference is that now he loses to those two guys that had the good counter decks.
If any more people would want in to that circle of winners, they would have to come up with a deck that wins against all of those three people. That probably wouldn't be possible, so the three guys would always see themselves in top cut, and the area's metagame would look like this: Tier 1: Guy with original best deck Tier 2: Guys with counter decks that are good Tier 3: everything else. I wouldn't call that healthy either.
tl;dr A metagame that only has rogue decks is impossible.