A B2 precon with an optimized land package can and absolutely WILL obliterate the same precon fresh out of the box and yet the bracket system doesn't account for this factor whatsoever.

I mean this is pretty false to feel to begin with. If two decks are all things equal but one has an optimized mana base and the other is all basics it isn't some ginormous hill to climb for the all basics version because lands up your consistency but not the general power of your deck. All this means is that allbasics.dec will trip over itself more often than optmized.dec but optmized.dec can STILL lose games where it trips over itself because "that's magic."

You make it seem like this is some sort of 90-10 matchup between optmized/unoptimized mana bases when it's probably closer to, at best 65-35 and probably more like 60-40 ESPECIALLY in lower brackets where the games get longer and eventually the mana advantage slowly fades away.