That's only because he was recently picked #1. When all is said and done, Embiid will be the best player to come out of this draft. The Cavs got scared because of his injury so they went with their second option, which was Wiggins. He will likely be a perennial all-star, and has superstar caliber talent, but it's his motivation and drive that's a big question mark. He completely disappeared in a bunch of games for Kansas last year. All Wiggins is is potential right now.
That's not to say McDermott or Mirotic aren't just potential too, but they have shown more than Wiggins has at this point. McD was the College Player of the Year and Mirotic has played professional ball at a high level for almost 7 years now. We all know what Taj brings to the table and would provide a great defensive compliment inside with Pekovic. Let's also not forget that the Wolves will be trying to keep Rubio around, and he knows Mirotic from their time in the Spanish League together.