I agree with you, if gambling is for entertainment, it should not be regular. We need entertainment most likely on a weekend, and if gambling is for entertainment, you can gamble an extra 1 to 2 times a week, but you can never gamble regularly for entertainment. Because if you gamble regularly, it will definitely lead you to addiction. So you should refrain from gambling more than necessary, and never gamble with more money than you can afford.
Sure, it is not a must to gamble daily if gambling is for fun only. 2-3 times in a week is still reasonable for the people who gamble for fun. They will also never use big amount of money because they don't target to win. In this way, it will be quite safe because they must spend the money that they can afford to lose only. However, it will be very much different with the people who expect much to earn money from gambling. They must force to gamble as much as possible because they assume it will increase the chance to win.