When I play poker, I don't get the same fun value when it's for nothing but the clay chips or even if it's for $2 total win (_when playing for pennies_). The _fun_ for me is when it's a $20+ decision, the _fun_ for me is to play against other people where the decision they have to make has _weight_ to it. I think that there is _fun_ to be had when you're playing for stakes that cannot be had when you're playing for nothing. When I throw the dice, it's not _fun_ to see if it lands on a 7 or 11 or whatever the rules of craps are. The _fun_ for me is the betting, the winning or losing of the money. If I just wanted to see who could get a set of numbers from random dice rolls without money involved, I'd play Yahtzee.
I agree that _some people_ shouldn't gamble because it's not _fun_ but an _addiction_. Just like _some people_ probably shouldn't drink because it's not _fun_ but an _addiction_ or shouldn't smoke weed because it's not _fun_ but _addicting_. That doesn't mean that there is _no value_ being added to the people's lives that _find it fun_ and don't find it _addicting_.
We may disagree on if _fun_ is of any value to people vs the harm that that _fun_ might give them and I think we both agree we should make it _really clear_ the consequences of the _fun_ someone chooses to have. But I disagree that gambling adds _no value_ whatsoever or the idea that what I find is of no value means that everyone should agree it adds no value. Let the players have their fun, tax the shit out of it, and offer help to those that have an addiction to it, just like smoking or drinking or anything else that we as a society have deemed not illegal but not directly beneficial.