For entrepreneurs in gambling industry, maybe not. But for me, gambling is wrong because i am never willing to lose money i earned with hard work, risked in fun activity but potentially lose money. Casino owners, investors or gamblers all have the same goal is making a profit.
Its not wrong in that case you only dont want to risk your money or to spend just to have fun as there are many things to do with fun instead of playing gambling. It is totally made for them to earn money not for us ,people only try their luck and their best stratedgy to win even sometimes it is not applicable and nothing to do with to win.
Gambling to having fun works only for those people who have a lot of spare money.
Not for us who earn a little money only and wish could make it double through gambling in few minutes.
It could be wrong or even mostly gambling turn wrong rather than a fine hobby , it is often causing serious problem.