Someone else pointed it out, but who else was around that was that much better than Dorsey that you would have drafted instead? Heck, Chalmers is the only guy after Dorsey I recognize at all as playing a fair amount in the NBA, and it's not like point guard is a huge problem of ours.
Aaron Brooks is drafted when there is 3 PGs in the team. Picks after Dorsey include, Chris Douglas-Roberson, Goran Dragić and DeAndre Jordan.