Well it won’t be a Transporter Bridge if it gets dismantled either, or just never “transports” again. Surely preserving it’s physical stature should be the aim, so it exists as a landmark even if not functioning how it once did?
Also, to claim it is one of the most iconic structures in the world is a bold claim. It’s the most iconic structure in Teesside for sure, but do you think it’s up there with Golden Gate and Sydney Harbour? If it was, I doubt it would have these kind of issues surviving commercially.