The Game of Opportunity discourages (hard-working habits) [by raising in front of people (the hope of getting rich quickly without working]].
Insist here means: provide.
Before men, it means: (bring) people.
Diligent habit: Diligent habit
Complete sentence translation:
Gambling by luck prevents people from being diligent by offering the hope of getting rich without working.
Game of chance: A game played for money or bets, usually by drawing lots or rolling dice to decide the winner.