Gambling increases the number of murders, assaults, robberies, crimes of violence of all kinds, etc. The underworld thrives on gambling. Police costs increase. Gambling corrupts government. Gamblers always seek to increase their odds and to buy protection.
Gamblers are soul-less in attempting to corrupt police, judges and legislators.
Instead of the state controlling legalized gambling, the professional gamblers often end up in control of the state. Gambling produces human desperation. Gambling victimizes the poor. Gambling leads to embezzlement, bribes, extortion, treason, suicide, and corruption of college and professional athletes. Crime often results from victims trying to recoup gambling losses.