That strikes me as low intuitively based on the 3 dice selection so I'm assuming I'm misunderstanding something (or perhaps it is that low) or asking a different question.

The results say that you will get to choose theater six 14.51% of the time if you roll three dice.

If that seems low to you, remember that you are also adding lots of possibilities to the other results as well, and the final probability is the number of results you want divided by the total number of possibilities.

Look at the entire distribution from 1 to 12 and you can see that it is very skewed. You added a new value 1, and the distribution is no longer centered perfectly on 7.

Thanks for confirming.