The NBA has completely changed. Yes, I was wrong about the finals MVP thing but I think the point still stands that in today's NBA, it's better to sign/trade your way to a title than draft. Yes, the Thunder are the exception, but they haven't gotten that ring yet.
The Heat signed their way to one. Chandler, Kidd, Marion, Stevenson, the Mavs brought in others. The Celtics brought in KG and Allen. The Lakers brought in Gasol and Odom.
Yes, it'd be nice (and usually optimal) to get an anchor through the draft (McLemore, Wiggins, Parker for example) but I'm not all about stock piling picks. Look at the Cavs. They have Kyrie and a bunch of mediocre draft picks around him. Their future isn't all that bright unless they sign someone else.
The NBA isn't what it once was. You can't say a superstar will be like Dirk and stay around waiting for a ring.