When describing the construction specifications of the Aron, the Torah says poles must be made to carry the Aron and placed in the rings on the side of the Aron. In 25:15 it says, "בטבעות הארון יהיו הבדים לא יסורו ממנו" - in the rings of the aron will be placed the poles, they should not be removed from it. Rashi adds "Forever" meaning the poles have to remain forever in the rings of the aron.
This means there is always going to be a prohibition against one removing them, even when the aron is sitting in the Beit Hamikdash and is not in transit.
What is the purpose of the poles during this majority of the time where the aron is not in transit? Why are they so important that there is a specific issur against removing them?
Furthermore, why require such an issur when physically they were constructed in a way that made them impossible to remove (the tips were wider than the size of the ring, so there was no way the poles could be removed)?
Why are these poles so important?
Do you have any thoughts on this?