It's said about brain that, "use it or lose it" — now, question being, do you think if person plays brainless gambling games such as slots, dice for major part of his/her daily routine, will it make him/her dull?
Playing simple gambling games can be fun, but if you spend too much time on them, your brain might get less stimulated, which can affect your focus and sharpness. That’s why it’s important to find a balance and include other activities that help develop your mind.