But as a general point, you can be both a "good person" and still do bad things. Or you can be a good person in some areas, and a not-so-good person (or even horrible person) in some other areas. People are complex.
Of course it's entirely possible that Altman is just a really good person, but I wouldn't be quick to make assumptions.
This works in two directions, by the way. In 2001 few would have expected that Bill Gates would spend much of his time on philanthropy. Is he a "good" or "bad" person? Well, he's both.
"Smart" does not mean "hard to fool;" they are different characteristics.
You can fool someone if you have important information that they don't have--even if they are extremely smart.