I saw it happen under my eyes, while in the (compulsory, at the time) military service.
We were working on a low scaffolding (< 1 m from ground - nothing “high risk”).
One of us slipped. His ring got caught in one of the joints and there his finger remained - it was not possible to reattach it.
I still remove my wedding ring whenever climbing, however minor, is needed, be it in the mountains…or changing a bulb.
