People made gambling look very bad because of lack of self control. Even before casino or gambling houses where created the issue of self control has been in existence long time however that is just the major problem of gambling. And now people are even considering gambling to be a source of income, creating space for addictive mindset. But its also good to create a religion around it to help protect yourself and your descendants from the dangers of becoming addicted to gamble.
That is it, they make gambling to look more bad because of the way they think towards it, that makes them to become addicted to gambling, they now think that gambling is just for money making machine, they don't have the right mindset towards gambling and this is very bad for one to do such thing and this will harm them mental and even destroy their lives for the worst. That is why its always stated and advised that one should gamble with the mindset to take gambling as a way of having fun.
The problem has always lies on how people see gambling and how they gamble. We all have different reasons why we have decided to be a gambler even though it's part term kind of gambling. Some people do have the mentality that they are definitely going to make a lot of money from gambling. There are gamblers that see gambling as opportunity to make small profits without making it a real source of income.