Interesting. According to the Wikipedia page for Problem Gambling^1, what you posted certainly plays a role. At least, for many individuals.
The intro section states that gambling addiction is an addiction and not an impulse control disorder because:
"the behaviors in problem gambling and most primary substance use disorders (i.e., those not resulting from a desire to "self-medicate" for another condition such as depression) seek to activate the brain's reward mechanisms while the behaviors characterizing obsessive-compulsive disorder are prompted by overactive and misplaced signals from the brain's fear mechanisms."
The psychological mechanism paragraph states:
"Several psychological mechanisms are thought to be implicated in the development and maintenance of problem gambling. First, reward processing seems to be less sensitive with problem gamblers. Second, some individuals use problem gambling as an escape from the problems in their lives (an example of negative reinforcement). Third, personality factors such as narcissism, risk-seeking, sensation-seeking, and impulsivity play a role. Fourth, problem gamblers have several cognitive biases, including the illusion of control, unrealistic optimism, overconfidence and the gambler's fallacy (the incorrect belief that a series of random events tends to self-correct so that the absolute frequencies of each of various outcomes balance each other out). Fifth, problem gamblers represent a chronic state of a behavioral spin process, a gambling spin, as described by the criminal spin theory."