Not a dumb question at all

the answers to these sorts of questions aren't always obvious.
When you have ranger or rover ticket (in other words, a ticket whose validity is geographically or zonally defined) you can use it in combination with another ticket, as part of a set of split tickets, to travel beyond its area of validity.
And by default, with such a split you don't even need to use a train that stops at the split station. You just need to use one that travels via the split station. Some ranger/rover tickets exclude the possibility of non-stop splits, but this is very much the exception to the rule and there are no such restrictions for Roundabout tickets.
It is only if all of your tickets are normal singles/returns that you need to stop at the split station.