Isn't Yoda the one that told Obi-Wan to go into hiding?
And you really think what the world needs today is to see fallen heroes?? Luke is/was a character that never should have fallen. He is the epitome of what Disney should want to convey as proof with their new SW tagline in "Hope". He never gives up and always fights for what he believes in. Something kids today need to see in heroes, not the realism that everyone becomes grumpy old men when life wears them down and things never seem to go as planned. This is fantasy, not reality. We have plenty of that already.
But instead they changed that. Instead Rey is now this character that will be selfless and strong, to show perserverance and to show women are the true strength and men ultimately will always fail. Han falls and goes back to his old ways, Luke falls and gives up and just wants to die, but Leia stays strong and continues the good fight. Even the new characters, Finn falls back to being a coward, Poe is thoughtless/arrogant, Kylo is, well whatever he is but another flawed male....
I really don't understand how any "True" SW fan can defend what Johnson did to Luke's characterization. Whether you accept it or not, enjoy it or not, how can you feel it's the character arc Luke deserved after how he was portrayed in the OT?