I hope this is not the case because it would be pretty strange with the abundance of 'Historic Fur' and all sorts of significant and insignificant clothes, cloths, vessels, plates, etc. that are in some way no longer politically correct. Ivory is beautiful and it breaks my heart no see some beautiful small pieces I have being deemed unacceptable,
I think the Ivory Scepter is a work of art. A relic from ages past and recognised as such. Hiding it away proves nothing and is probably a sort of hierocracy, sort of "if you don't see it, we don't own it and our hands are clean". If a bygone royal had hunted the elephant whose tusk comprises the Sceptre I would say think it wise not use it.
But that is what the Coronation is all about. Part of the history of the British Royal Family that binds the UK and some Commonwealth countries and to use the Sceptre with the the ceremony being shown around the world, perhaps people will understand how beautiful it is and start to understand what drove the Ivory trade and why it is forbidden just as fur is sort of in the same boat and even more, importantly that there is no virtue in hiding it from everyone like it never happened. Showing the treasure of the Crown jewels is important depending on the reasons why there are the caveats covering some pieces.