It is false to accuse demo games for something, as each gambler is an individuality and searches in gambling only what is interesting to him. This is the same blind accusation, as saying that video games motivate people for violence. That after playing shooters, people would go on the street and start shooting people like they did in video games.
To me those two are kind of different - I have played demo game and watched action movie and I know that both of them don’t give off the same vibes.
For example, when dealing with a demo account in a gambling site; the algorithm is built in a way that the player experiences more wins than losses and if it’s someone who doesn’t know how it works or it’s just new to gambling they might think that if they try the real game they’ll be able to achieve the same result. To me, that’s how I feel Demi could bring about irresponsible gambling.
But I still agree with you though, someone who’s stupid and irresponsible falls under the category I described anove while those that know what they are doing won’t fall for it.