Well no, he didn't have to express a specific request to join Man Utd. He had obviously thought about leaving for a while, he wouldn't have released that statement in early July otherwise. Like he said in that statement, there were differences in that meeting - I highly doubt he was told he'd be sold at that meeting.
Well in fairness, I am not sure there is a debate to be had. Everything publically in this situation points to have a wish of joining Man Utd - sure we are complicit in that by eventually selling to him but you're kind of suggesting he was sold against his will and only decided he wants to join Man Utd after being told he'd be leaving Arsenal. Doesn't make any sense.