Some ppl gambled for fun that's how their addiction started. If they're gambling with the correct mind it isn't going to become a problem but if their mind gets addicted to gamble it's going to change their life for ever. When you gamble you're going to lose money the companies don't.
Excessive of anything is bad. Gambling is a social vice and a practice that can lead you to addiction. When you fail to realize that you can be addicted for merely gambling for fun, you will limit the time that you are spending on gambling. Healthy gambling should be practiced to avoid bringing shame to yourself and your family members.
Anything in excess will lead to bad things, whatever the case, you must manage it responsibly, and it is most important to limit yourself when it comes to gambling, gambling can destroy you completely, if you are uncontrolled, but if there is a limit, it will not harm you, because if you manage gambling responsibly, it will not harm you. If you do not want to put your future in danger, you should definitely limit addictive activities like gambling.