At the risk of eliminating any of the respect I most likely have never bothered to garner around here, it seems vaguely amusing to me that someone would act surprised at the notion of losing money... in an activity that involves gambling.
This doesn't logically follow.
The (foreign held/owned) money was not lost _by_ gambling. It has been (potentially) lost due to an arbitrary US law that determines the card game, Poker, as being an illegal destination of US bank funds.
If a player loses money whilst playing Poker, then he or she would have no right to complain. If another country's laws impact your ability to partake in an activity that is legal in your country, then there is _large_ cause for concern.
Whether or not you _personally_ agree with gambling is not the point. Further, there are issues with classifying Poker as 'gambling' within the conventional sense of the word, as it is not _purely_ based on luck. There is a large element of skill; if there wasn't, you wouldn't see a hierarchy of players. the top fifty of which consistently make it to final tables at large tournaments.