He's not necessarily wrong, or right. It's just that Cleveland financially done all they could to appease LeBron. And to add, LBJ's comments weren't as specific as you made them. Had he simply said "We may need a backup PG, and a veteran big to help us overcome the ebs and flows of this season and to help give us the best shot a title defense" than that would've been received better. He made it seem like they were surrounded by scrubs outside himself and Kyrie. Kloves been killing it. This isn't those bum 00's Cavs teams he used to carry. He has more parts than most teams.
And like Kenny alluded to, yeah Golden state is stacked, but you can't use what Golden state did as a berometer for what Cleveland SHOULD do. KD did something unprecedented. As Cleveland/LBJ, you can't expect to land the type of player that GS acquired. You gotta make do with all the talent you DO have, and so far, Cleveland has done all they can to make sure that they maxed themselves out with talent.
At the end of the day, LBJ IS the playmaker/point-forward. He loves to play with the ball in his hands, and the only players he defers to are Klove and kyrie. So even adding a third playmaker, would LBJ be willing to defer and let this hypothetical third takeover when need be? They don't share the rock quite like Golden State does. It may be a coaching problem, rather than a talent problem. They already have playmakers and guys who could knock down an open 3.