Saying their isn't a lot of difference between the third and fifth pick is a lie.
Even if their are two players in a class of their own and then everyone else, the third pick would give you the first selection over everybody else which is very advantageous. He could pick the best of the rest that would be the best fit for his team. Now their is a chance that his first two choices might be taken.
It's not a huge deal but it does suck. Their is no need to sell it otherwise. He moved down in the lottery. He lost a game he had no control over, the end.