Sure, that’s the primary driver. But how many great discoveries are published anonymously? Even if my primary goal is knowledge for its own sake, I’d still like to be recognized for it.
On the other hand, there have been a few cases lately of academics falsifying their data, or otherwise faking discoveries. That’s something that a lover of wisdom would never do, so if we’re going with this trichotomy, I suppose you would have to classify those folks as lovers of honor or gain.