Both can be dangerous for a human being. If you get addicted to alcohol, your health will be at risk, same like if you get addicted into gambling, your mental, emotional and financial health will also be at risk. As much as possible, alcohol and gambling should be dealt responsibly.
However, it’s undeniable that there is greater disadvantage if you fall into gambling addiction. Not only you will make your life miserable, but you also become a problem to the people around you, and for that you are also making their lives miserable as well.
The same way both can be dangerous is the same way both can be done in a healthy way that can be enjoyable. Alcohol are good to some percentage, but this is subjective to taste of alcohol, you don't want to start taking dry gin and some harmful alcohol that are too concentrated, they are not good for health but the less concentrated ones consumed in low amount are good for the body. This is why we have to make sure they are done in low amounts.
Similarly to gambling, if you look gambling beyond money you are young to enjoy it but if you are money focus, you will not enjoy but at the same time, I'm not saying we should be money focus on gambling, try as much as possible to be neutral, look for the money with fun of doing it and not because you have some bills that you want to settle at the end of the day
or probably see as way to escape that your broke lifestyle, the end is always addiction you can't control.