I agree that Rondo should never have been considered the best point guard (it was too easy to defend him late in games, as Gurley pointed out), but I think the bolded part is kind of absurd.
A lot of people point to the fact that Rondo played with great players, and they definitely should. Who knows how his career would have turned out if he didn't get to play with three 1st ballot HOFers?
But by the same token, Pierce, KG and Ray benefited significantly from playing with Rondo, too ... particularly in the latter part of their careers. Let's not forget how limited the Big 3 were their last couple years in Boston - Ray was primarily a 3-point/mid-ranged shooter, Pierce had lost all of his explosiveness, and post-injury KG scored most of his points on jumpers. As much as Rondo benefited from having so many skilled players around him, Rondo probably helped those guys continue playing at a higher level for longer than they would have otherwise.
I have no idea how Rondo will adjust to life after KG/Pierce/Ray (although he's done fine the few times he played without 'em in the past). I just take issue when people act like Rondo was the only one who benefited from playing with the Big 3 when, in fact, the advantages worked both ways.