You are right,  at least the wage is fixed or there could also be an increment depending on the reason, plus the other advantages that applies to what you can benefit from your job but such advantages can not be seen in gambling. When you have a job, at least you are very certain about your income either weekly or monthly unless you are sacked from the job, in gambling there's no certain expectations for any fixed amount. While running a business, you are certain of the turnover unless the there's any business crises but in gambling, financial losses is always  .  When you say you are going to make $2, 000 from gambling by the end of the month, if only the casino will hear you, they would say, "don't be so sure about that"