There simply wasn’t enough room to have the kind of nuanced conversation the subject requires. It was symbolic of Twitter’s broader problem: It’s almost impossible to have a smart, healthy argument on Twitter because no one has the space needed to share their thoughts.
Anyone remember Friendfeed? Actually, perhaps a more interesting solution could have been Google Wave.
Neither of these options are around any longer, and their successors don’t have the traction or appeal for this sort of use case.