Wow, there is so much wrong with this sentence I can't believe it got up votes. This particular study may have flaws, and/or there may be errors in extrapolating the results of this isolated game to general workplace dynamics, but that doesn't mean science is bad.
"Common sense" does not, ever, trump science. "Common sense" is a lazy excuse for "I have an opinion that I can't back up with any data". How many times haven't we all read someone trying to make a claim like "It's common sense that marriage should be between one man and one woman".
Different people might have wildly different ideas backed up by "common sense". That's why we do studies - to find out what the truth is, even if it disproves our initial guess or we are uncomfortable/unhappy with the result.