Yeah, except that it really depends on what your definition of "marginal" is. I know guys who think that the 300 Win Mag is "marginal" for deer at 300 yards. It's a load of crap, but that's what they think. I also met a guy who had bought a .416 Rigby to hunt elk because he didn't want to be "undergunned" with his .30-06. Too bad he didn't listen to the gun shop owner that tried to talk him out of it, because he also complained about how much the ammo costs.
People have all sorts of crazy and/or stupid ideas, and other people like nothing more than pointing it out. That's why threads get locked. This one is on its way there right now.
Mike