There&#x27;s an aesthetic difference in rolling different sorts of dice, they have a different look and feel, so game developers <i>could</i> reduce all rolls to some standard die like d6, but rolling a variety of dice is &quot;more interesting&quot; to players.<p>There are systems that are all d6s, there are systems that are all d10s. There are systems that like to pick dice based on the whims of what seems most interesting to players.<p>Games are typically more about fun than practicality.