SilverWook said:

imperialscum said:

The whole back story is dumb. If Obi-Wan had any serious plans with Luke, he would have raised him himself and, more importantly, started his training at the very early age.

I have two explanations for this thing. One is simply being a plot hole. The other is that Obi-Wan and Yoda knew that Luke could never defeat the Emperor and therefore they planned to use Luke just to trigger Anakin's return who would then destroy the Emperor (which is what eventually happened in ROTJ).

Early on, with the Empire hunting down Jedi, the moisture farm might have been the safest place for Luke. There is dialog about wanting to have given him the lightsaber sooner, but Owen forbade it.

Luke knew where Ben lived, and what he looked like, so they must have met before if only in passing.

Arguably, Obi Wan was waiting for a sign, and it came in the form of a message carried by an Artoo unit he pretends not to recognize. ;)

Well a house in the middle of dune sea is even safer place, if Obi-Wan took him there and train him (without Owen even knowing about it).