Uh...no, I'm not saying that at all.
The Lakers don't need an all-star PG. If one is available in the draft, you take him because in the draft you always take the best player available.
Same reason why the Wizards drafted Wall even though they already had Gilbert Arenas manning the point - you take the best player available, period.
The Lakers would've taken John Wall if they had the first pick in the draft. That doesn't mean that they NEED a PG of Wall's caliber.
I'm confused by how you interpreted my statement. All I said is that teams don't necessarily NEED amazing point guards to succeed, and you took that as saying I was implying that the presence of Derek Fisher somehow means the Lakers would've passed on Wall (which is insane).