Why didn't they just sew Anakin's arm back on?
~It was severed cleanly and cauterized instantly below the elbow. (according to Timothy Zahn, a lightsaber's actual cutting surface is microscopic in area... so there was almost NO tissue damage or scar tissue formation at all) It was also lying right next to him on the floor.
~The injury occurred in a relatively sterile desert environment.
~He was rescued by Yoda mere minutes after the injury occurred, who could've used the force to help necessitate the wound's healing.
~Clone medical units arrived on the scene immediatly, with state-of-the-art combat triage to stabilize the patient on the ground until he could be sent to an orbiting medical frigate, and finally to the galaxy's finest medical center.
~Padme must have been turned off by his freakish metal arm, at least to some degree.
~If they can attach cybernetic limbs (indeed, create whole cybernetic bodies), then the surgury to reattach an existing limb should have been a breeze. It should have been the first, most logical option.
~Rehab for the limb could be overseen by the Council itself. (lightsaber training, Force projection, etc.)
~As the "Chosen One", wouldn't the Council prefer Anakin as whole as possible? If "everything" depends on him, wouldn't they spare no expense in his healing?
Now, I know the answer is that Anakin is beginning to lose his humanity on the path to becomming Darth Vader, but it's like the Jedi actually went out of their way to attach a mechanical arm, instead of reattaching his real arm.
If I may quote Eric Cartman to sum up my thoughts on this matter: "Lame"
"Reality is a nice place to visit... but I wouldn't want to live there."