Its the awareness entirely,naturally,before ever we want to get something or do something,we are always adviced or been given an advice towards the set plan/goal,Whether good or bad.The awareness that they have puts them in charge of their thoughts,decisions and actions.
Once someone hears the word gambling,that word extremely places an individual with a very high anxiety and lust.Whenever you introduce someone to gambling also coach him/her to be able and available to take responsibility for their behavior.
It's very understandable that gambling is toxic and one should be guided about the risks,gains and losses.Know when its appropriate to get help,advice,and informations on how to use to right tools for a safer gambling.
Apart from that, when taking actions or decisions it is of course better to consider them carefully first. with those who are beginners who usually don't think about the losses that will occur, they can do whatever they want without thinking about the exact risks that will occur with the gambling they do, and with those who don't think about the risks that will occur, they usually easily become addicted and as a result makes them addicted to gambling by not being able to stop gambling, even though they lose at gambling, but because they have become addicted to gambling they will return to gambling to bet again.
I agree with what you said, when we introduce someone to gambling then we have to be able to introduce them well by telling them everything so that nothing untoward happens, but I myself would not do that, I would not introduce someone to gambling, even if If they want to do it, I'd better remind them not to do it even if they insist, maybe it's just advice and after that it's up to them.