Thank you for reading, and for your comments.
I am not a psychiatrist, although I am a physician in the USA. I cannot speak about how medicine is practiced in Australia.
Here are a couple links to ECT as it is currently administered in the USA, from the Mayo Clinic:
https://www.mayoclinic.org/tests-procedures/electroconvulsive-therapy/about/pac-20393894
and the cosent form for ECT from Johns Hopkins University:
When I was a diagnostic radiologist (fairly recently, in 2019) in a tertiary care over 400 bed hospital in a sizable metropolitan area of the USA, we would, on occasion, evaluate spine x-rays ordered on patients who were about to undergo ECT. If fractures were that rare consequent to ECT, why would a psychiatrist want to see pre-procedure x-rays of bones that were most prone to fracture?
While fractures may be rare, they are mentioned in the consent form, the link to which I provided.
Personally, I would have ECT for depression as a last resort.
I disagree with your final statement: "Not enough facts."
You are entitled to your opinion, of course, just as I am entitled to mine.