My first line of questioning isn't about level of happiness so much as type of happiness. The sort of happiness I feel on completing a difficult task is different than the sort of happiness I feel on watching a good movie.

Likewise, the sort of happiness I feel when I learn something is different than the sort of happiness I feel when I'm comfortable with myself. Because of that, I can't honestly say that learning the truth about something would make me less happy. Likewise, I'd say that people who choose one or the other would simply be prioritizing one kind of happiness over another, unless we're excluding that sort of satisfaction from our definition of 'happiness.' (Hence all the questions.)