Running a casino is work too, and I don't doubt that those who run the bars and restaurants in a casino can take pride in jobs well done. But beyond the immediate chore in any job lies its larger meaning. Making a useful contribution to life is innate. Ecology has revealed that living systems reward cooperation. It is no accident that healthy ecosystems are resilient and stable.
Life encourages life.
The pride you feel when teamwork succeeds is not artificial. Community is the embodiment of that ethic. Most everybody wins because most everybody wins. Organized gambling, on the other hand, demands that there be more losers than winners. Otherwise the organizer doesn't make a profit, which naturally enough is the whole reason for organizing the bets.