To answer creator of the thread : No Taris is not worth saving from economic or logistic point of view. As you said it's silly, but both sides battle each other for it in political scene.
Taris was a symbol. For the Republic, fixing Taris would be a becon in the dark; saying "Hey, if we can fix up a planet this bad then we can do anything".
For the Empire, Taris was a symbol of the Republic's inability to stop the Sith. It was a "Look here, the Republic failed to save Taris the first time and they're failing to save it again."
Symbols have power all of their own, they give hope in the darkness or swallow you in despair and that's what both sides are counting on.
QFT. This man gets it. There's nothing more to it.