You know when to stop when you are losing money everyday and also playing everyday for profit and not for the enjoyment in my eyes that is the sign of addiction and you know you have to stop with it.
if someone is addicted to gambling will be hard to stop as you have said when defeat every day and still only gamble of course he already addicted to gambling as I know there is no way to stop someone if it had been addicted with something except death.
You are right, but my opinion is different from you, Gambling is a good game, it is not disease, if someone has been addicted it, so don't need to worried about it, because most of the ways are here to avoid it or to less play of gambling. If we don't want to addict the gambling, so Firstly determine, and secondly, change your mind in the other fields, and don't need to left the gambling, play it but not continuously.
not as easy as what you say, when you've become addicted to it is a disease and it's hard to quit.