The strands were broken from the two recent overload events.
Sorry for lack of a link, but somewhere in the various videos I've watched about this recently there was a short sequence of pictures of the cables, taken by drones.
They are a mess. Steel multi-stranded cables, several inches thick, in which there is a lot of internal rusting causing random bulges. The spreading of the strands causes uneven stress on the strands, and together with the corrosion, results in LOTS of broken strands. Many, many places where there are broken strands sticking out like hairs.
So when they say the entire structure could collapse at any time and it's too unsafe to work on, they don't mean the extra weight of workers could make it fall. They really mean it could go at any moment. It has no remaining redundancy, and strengths of the remaining cables are continually reducing due to corrosion and ongoing strand breaks.
The final failure mode would be completely unpredictable, but will likely involve huge cable whipping around, the antenna falling in some random arc, and the support towers falling over dragged by unbalanced cables. No one is going to go anywhere near it. No helicopters, no building an emergency support tower under the antenna, and even walking around under the dish meshwork is a death sport at the moment.
I'd think even controlled demolition by placing cutting charges on all the cables so they can be dropped in one go, would be an extremely dangerous job.