I agree people are looking bit far into the comment. But, I do think the fact that Moore did not just say "Yes, Derek Carr is our starting QB" means that there is at least some question in his mind if Carr will be the starting QB. That could be about whether Carr will take a pay cut, could be about whether they could actually cut him and field a competitive team, could be that he's not sure if he can find a better option, etc.
But, I do think it's fair to conclude that Moore and the front office think there is a decision to be made regarding whether Carr is the starting QB next year.