So, you are telling me that letting an orange dry out and crush it up and eat the dust is as good as eating a whole orange?
You lose some of the integrity when you crush up the green tea leaves....
Your analogy would be better applied to brewing tea with a dried leaf vs a freshly picked leaf, and even then it seems like a poor parallel since oranges aren't steeped in hot water to create an infusion.
When the tea is chopped fine for tea bags it's for convenience. It brews faster but also means a shit load more of the tannins leach out & make a much nastier tasting brew.
Increasing the surface area would reduce the brewing time, but I don't see how it would release a greater percentage of tannins than would be released by a slower brew. I was under the impression that green tea shouldn't be brewed in water that is too hot, since that will make for a bitter brew. The longer brewing time required for unchopped leaves would allow the water to cool off more as the tea steeps, which might explain the reduced bitterness of a slower brewed tea if someone was using water straight off the boil.
On the other hand, you guys might be right. I don't know much about tea. I just find it hard to believe that a whole leaf would infuse its tea so much differently than a chopped leaf.