I guess that depends on how you value Cousins. Here is a list of guys who were top 10 draft picks from 2007 to 2012.
Anthony Davis
Damian Lilliard
Bradley Beal
Andre Drummond
Kyrie Irving
Brandon Knight
Klay Thompson(11th)
John Wall
Cousins(himself)
Paul George
Blake Griffin
James Harden
Step Curry
Demar DeRozan
Derrick Rose
Russell Westbrook
Kevin Love
Kevin Durant
Mike Conley
Joakim Noah
Al Harford
That's 21 players in 6 draft classes. That is almost 4 players in the top 10 that were great picks. Unless I'm valuing Cousins at the top of this list, then I'm never giving up 2-3 chances at getting picks in this range.
It's a fair point, but I would counter a few things:
1) It's a strong list, but I think Cousins still goes top-10 in a redraft of those years. He's that good... 24-12-3-2-1 and strong defender. After Durant, Davis and maybe one or two other guys he's at least in the 2nd tier. Maybe top 4-8 with George, Westbrook, Curry, Harden. So out of 60 picks, I would say you have about a 1 in 7 shot of getting a player as good or better than Cousins. Picking 3 times less than 50%.
2) You conveniently ran your draft range from Kevin Durant to Anthony Davis. If you include 2004 and 2013 you might get two more guys on the list (Chris Paul and Dwight Howard). Suddenly it's more like 20 players out of 80. Add 2003 and you get that killer draft (LeBron, Carmelo, Wade, Bosh) but they all went top-5 and would be pursued by a major tankathon (see below).
3) The Nets picks are unlikely to be top-5. That would rule out Durant, Davis, Paul, Wall, Westbrook, Harden, Love, Conley, Rose, Irving, Howard and Beal. Brooklyn may be bad, but they are a major market team that doesn't own their own picks. They have no reason to tank and the money to win, despite their roster issues. Even if they are in the lottery every year, it's more likely to be in the 8-14 range. Top-5 would require around 25 wins and down for a team that's likely to be spending $100M with no incentive to lose.