Your premise is false. If you put away your biases and negate your premise, then it makes sense.
Bioware Dev: "When you hit max level with your character, definitely reroll and try another one.", theres definetly more quotes of the sort in other interviews..
Its pretty clear this was a large part of there "end game", to re roll alts to keep people occupied for alot longer. If you were in the beta you wouldve noticed they had hardly anyone testing end-game content, because there hardly is anything fun about endgame.
u completely not understand what is a MMO.
Clearly I dont
..The game caters to single players, it DOESNT feel like an MMO at all.