That reasoning doesn't make sense to me. For one, most intros are skipped after the first watch. But sometimes a great intro draws you in and you watch it every time you load the game up. Those are rare, but awesome. Games aren't the solitary experiences they used to be, but there are still lots of solitary experiences.
Also, there have been numerous games with classic intros that take place in story based games, especially RPGs.
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GTAIV and V didn't have a customary, traditional intro btw.
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