Rational self interest might be a myth when applied to the extent that some economic models apply it, but at a basic level holds up. I know /tons/ of people that have taken one job over another because it pays more, even if it's one that they're less interested in.
Not everybody has the luxury of being passionate about something lucrative -- that's not something you really have control over (maybe some, but I don't think much. This is another issue entirely, though). I get that it might be lamentable that an industry isn't full of the most passionate people anymore, but the tradeoff is that it became a large-scale industry. If the original author wants the kind of deep, nerdy devotion he used to have, he can find it! There are plenty of research institutes and startups investing in long-term big bets that need this kind of thing. But being mad that /everybody/ isn't that way anymore seems childish.
Not everybody has the luxury of being passionate about something lucrative -- that's not something you really have control over (maybe some, but I don't think much. This is another issue entirely, though). I get that it might be lamentable that an industry isn't full of the most passionate people anymore, but the tradeoff is that it became a large-scale industry. If the original author wants the kind of deep, nerdy devotion he used to have, he can find it! There are plenty of research institutes and startups investing in long-term big bets that need this kind of thing. But being mad that /everybody/ isn't that way anymore seems childish.