I agree with you that gambling addiction has nothing to do with spirituality, but possibly an irresponsible approach or act on the part of the gambler, which might result in such an occurrence. Spirituality does not have any relationship with one turning into an addicted gambler, as I do not see anything that connects them together. Maybe if gamblers discipline themselves while gambling, the issues of addiction would never be the case to start getting worried about in the casino.
it's a weird subject to talk about because we usually don't know in detail about the laws of the spiritual world
in theory if you believe in spirit and energetic matters it would affect our lives fully, without exception
but how to know for sure?
at the end of the day I agree that when discussing gambling it's better to be more pragmatic and direct instead of imagining too many things.