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Yeah, no shit games are a waste of time, but so are sports, television, podcasts, the internet, music, masturbation, sex without the explicit purpose of procreation, reading, etc.
You do these things listed above for fun, to relax, to kill time. They don't help you achieve anything, they are a goal to attain. Your reward for being virtuous and diligent is that you get to do something you like. That's everyone's ultimate goal - to be able to feel accomplished, rest on their laurels, and just have fun.