Lucas should have given Obi-wan a robot leg in the ANH Special Edition in 1997 so that people would have speculated endlessly over the next 8 years about when during the prequels he lost it, then never have him sustain this injury, making it clear that it just happened sometime later and had no bearing on the plot.
And he could have made it C-3PO’s missing gold right leg.
Well see now that’s almost interesting, so it would have never happened.
What, you don’t think this added interest and intrigue to Star Wars?