Which is, again, why lists like this exist. So you can go "ah, this class needs more experience to play well, and this class needs more help from the DM".
For example, if you go back to the early posts on this thread, it shows a lack of understanding of how the game would progress. Nothing against anyone who posted, it was still early to see how things would fall out, though a lot of the worst imbalances were right there in the PHB, with things like Polymorph Any Object, Wish, Miracle, Gate, and Simulacrum. Fabricate/Wall of Iron was totally a thing (not to mention the Shrink Item/Wall of Iron combo), and it only got worse when more books came out.
But it is true that a good DM and a conscientious player can make even a very unbalanced class perfectly fine. For example, my last 3.5 game, I told the DM that I was going to play a Divine Metamagic Persist Cleric, but I was only going to use Persist on buff spells that affected the entire party.
And once I got rolling, everyone's numbers skyrocketed, but since it affected the group, no one person got to steal the spotlight. My usual contribution to a fight was Fiery Burst, my reserve Feat, unless I needed to heal someone!
The DM was able to respond by upping the challenge of encounters, but it did eventually come to a head when he admitted that he had reached his limit once we hit level 11.
And not once did any of the players feel overshadowed by my character, in fact, one of them (admittedly, the least savvy character), would often ask what I even did!
To which I just pointed to the index cards in front of him with his various buffs. "That's what I do."