I think gambling every day means someone who has lost control. Gambling is a risky thing. Gambling every day means taking a risk every day. I don't think it's better to gamble every day. Instead, I think we should only gamble on days when we have solid analysis or when we feel lucky. Gambling is an addiction and it's a fun addiction, but it's better to do everything in a reasonable dose.
I don't know if it is categorized as lost of control, but playing gambling every day may be indicated as addiction. The gambler who always gambles every day is likely hard to be separated from gambling. Whenever the gambler has a free time, he will try to play gambling. If you know there is your family member who did this, he may be addicted to gambling. You can give an advice to him to evaluate his gambling habit.
Sure, gambling is risky because we have a chance to be addicted and spend too much money. That's why we must understand how to gamble with a proper way. Smart gamblers must understand when he can gamble and when he must stop it temporarily.

Imho it might be indicated as an addiction, if daily gambler can not stop gambling until he looses or someone forces him to pause. In other case, this is more like a hobby, a fun activity, a way to spend some time. If a person does something daily, I would not rush to call him addicted. Just a daily routine. Because, for example, we sleep and eat every day. Can we be called sleep and food addicted then? Professional athletes train daily, because they have a goal to achieve. We do not call them sport addicted. What if person gambles daily, because he wants to win a jackpot? Instantly all those stories about persons who were buying lottery tickets daily and betting same numbers, appear in my have. This was their tactics, not an addiction.
Most likely that's the real happening there since if they can't stop and always think about gambling for sure they fall in category that they are been addicted to much on gambling, Although there's nothing wrong with these if you are in control and have a lot of money but if you can't control your emotion then I guess the mistake start to happen when deciding to do such things that you can't avoid.
Also we should not compare a gambler and athlete since its different cases. Much better if they stick on real comparison or stick to the gambler it self since we can see or figure out if the person is addicted or not since for sure we experience some of it then can define if the person is on state that they can resist gambling.
Nothing if they aim to win the jackpot by betting small then its fine since there are times that we are trying to participate then figure out if luck will possessed us then it will be life changing to us.