Lol XD I think the only chest that sometimes indeed contains meteorite bars is shadow chests, which are always locked. and you wouldn't have the keys pre-skeletron. shadow key is in locked gold chests in the dungeon. while normal chests sometimes generate in the dungeon above 0 depth, and those might contain a gold key, I don't think you could find a locked gold chest above 0 depth.
I think there is a thin line, like... between 0 depth and -3 or -4 or so, where a dungeon guardian not spawn yet, but dungeon music plays, so it might be the dungeon biome, but that depth is usually still just the long zig-zag corridor leading to the deeper parts, there are usually no chests there, just below. and it would be likely awfully difficult to make a lake there to fish for dungeon crates (it's also possible they not show up prior to defeating skeletron or something?)
so, hiiiiiighly unlikely you could get a shadow key pre skeltron, thus, highly unlikely you could open a shadow chest in hell.
And, if you actually can defeat skeletron, and survive in hell, you most likely would have no problems tackling EoW or BoC, making aquiring meteor much easier.
This could work maybe for a strategy though where EoW/BoC is ignored for the sake of having no meteors fall, ruining the landscape here and there, but you still can aquire meteor. However I'm not quite sure how useful that is so late in pre-hardmode (I mean, post skeletron). but, yes, I guess in that regards it makes some sense.
But otherwise it sounds quite impractical.
(it was easy to aquire meteorite early game before 1.4 though. but the change is good for balance reasons.)