The draft, just like the rest of basketball operations, still comes down to making smart decisions. OKC has one of the best talent evaluators/cap magicians in the league. OKC is a perennial contender now because Presti made the most of his high draft picks. The Clippers/Wolves did the same thing but are still mostly failures because they couldn't consistently pick good players. Clippers have Blake and Gordon, Wolves have Love. That's still better than we have, but obviously both teams should have gotten better players in other drafts.
Also, OKC is not the only example. How about Cleveland, Miami, Orlando, Chicago, and New Orleans? One player completely changed the entire fortunes of those franchises. Cleveland went to nobodies to contenders. Orlando went from overspending idiots to contenders. Miami won a championship. Chicago went from limited young upstarts to having the best record in the league. New Orleans nearly won the West. Even to a lesser extent there is Toronto (made playoffs twice with Bosh), Denver (consistent 50 win seasons with Melo), and Portland (washed away Jail-Blazers era with Aldridge and Roy until injuries hit).
And that's not even counting the Spurs, who landed Duncan and became a multiple championship team.
Dumars has not made a good basketball decision outside the draft in nearly half a decade. It's time he stopped trying to bridge a gap when the bridge is destroying anything on the other side.