FF XV story COULD be best of all times (huge disappointment)

[tivec]

Kowan said:

And why Noct was 10 years asleep? Did they even explained it? Why Ardyn let Noct go and do whatever their wanted?

 

Ardyn wanted a worthy opponent(the True King) and also wanted to destroy the crystal. Without the Crystals power, Noctis will not be able to do anything to Ardyn. So I guess with Noctis absorbing the Crystal, Ardyn would be able to satisfy his needs, which is destroying the True King, fighting a worthy opponent and destroying the Crystal.

Also it is within the Crystal that Noctis learned about his mission(thru Bahamut), who Ardyn is and such. 

So Ardyn actually helps(and annoys) Noctis on his journey so he could get to the crystal because that is what he wants.

ok, but why he was asleep/away for 10 years?