at the end of the day, problems are at different views here. I find games are very similar in many aspects, such as relying heavily on RNG to make outcomes varied. If normal no cash poker is adult, then games like uno and other forms of RNG based games like rolling dice can just as much be adult from your reasoning. I am not particular to labeling games in this way.

there are many more nuances to labeling as adult oriented, such as ability to cause oneself to be worse off in life to the point that it is harmful (like losing your life savings or going into debt) or the content is sexual. that is what I would consider requirement for labeling as adult. I personally think anything that is tied with cash should be labeled as adult. yet, right now, this line is heavily blurred by microtransactions, lootboxes, cosmetics, in game currency and other ways to play with cash.

Playing with cash should be adult, but in game cash you cannot sell or buy is not something I think I can equate here because I see it as another incremental simulator kind of game, like many idle games are like now a days.