You didn't say if we are talking gold or platinum. I will relate an experience I personally had involving gold prongs.
I lost a stone from a ring when a seemingly, perfectly fine prong broke. I don't know how it happened. That morning when I went to work, the stone was there. Later that morning, I noticed the stone wasn't. My coworkers helped me scour everywhere I'd been those few hours, looking for the gem I'd lost. No good. We didn't find it. I hadn't hit the back of my hand on anything. The ring hadn't rolled around so I would have hit it against the edge of a table or chair back. I didn't snag the prongs on clothing or anything else. The prong just gave at some point and I lost a diamond.
I had just had the ring in for cleaning and inspection about a month before that happened. Fortunately, it was a side stone in that ring, and I was able to get a repair done easily.
I wear my rings almost all the time. Shower, sleep, wash dishes, vacuum, type, etc. But, I don't abuse my rings either. If I'm going to work in the garden, do something involving lifting or anything hard on the hands, I take my rings off.
If a seemingly, perfectly sound prong can go in the blink of an eye, imagine what can happen to a prong that has already been structurally compromised.