It may not seem like there is a big difference between one or two spots but in truth it can make a massive difference.
Imagine having the 16th pick in 2013 and wanting to take Giannis but he gets scooped at 15.
Imagine having the 28th pick in 2013 and wanting to take Rudy but he gets scooped at 27.
Just one pick difference can change the entire course of your franchise.
In a normal year this wouldn't bother me that we fall from 20 to possibly 23. But we're trying to contend for a championship. We have a good core and just need a couple correct pieces to fill the holes. We're limited in what we can do in free agency. This one draft pick we have this year is MASSIVE. We need a good player out of it.