The problem here is one of mindset. The worst of all worlds is to attempt to play cards and make choices when you are upset. Fred's thoughts were with his daughter, not on aces and faces. Not to sound sarcastic but if you are going to a casino to socialize, then you had better bring the self-restraint leash or be prepared for the worst and leave the larger denomination bill and credit cards behind. How you feel about life in general most definitely affects your play.
Specific worries can lead to disaster.
Even the best card players can make grievous errors when their minds are pre-occupied or not thinking clearly.