That's at best a gross oversimplification of what he said. At worst it is a complete fabrication. He talked about how difficult it is to make a trade. How you can't just trade for a player- the player's team has to actually trade him. In other words, it takes two to tango. They even talked about how he called Boston about Rozier. Jones simply said it is easier to sign a free agent than it is to trade for someone.
His exact words were:
“I say it all the time, it takes two to tango. So, when your primary vehicle for acquiring a player is via trade, you don’t control that. We’ve seen time and time again you don’t control that,” Jones said. “At some point, the other team can back out or you can back out. So, the only way you can add is free agency, where you have more control, and the draft where you have complete control. That, for us, it will most likely be free agency. Just because when you look at our team and the way we construct it.”
That's a far cry from "having no interest in a trade."
Now, that said, I agree with you about Rozier, and would add that I am not a fan of Russell either. I would also point out that it is quite risky to rely on free agency too. Putting aside my dislike of Rozier and Russell, let's assume they are actually great targets for the Suns. What do you do when Celtics match Rozier's offer and Russell decides to sign an extension with the Nets, or signs elsewhere. Same thing with Rubio- what if he decides he likes Utah and extends with them?
