But then, we should probably also apply Hanlon's razor [2] "never attribute to malice that which is adequately explained by stupidity"
Rhetorically speaking, Hanlon's razor doesn't quite have the same weight as Occam's, if only because people tend to view behavior they don't understand as stupid. But I'll add another "razor": don't attribute to malice what can be attributed to self-interested.
My point was more that the dichotomy stupidity vs. malice seems to imply that e.g. playing music, or having dinner is either stupid or bad. Many things get done out of self-interest without being malicious, or without malicious intent.