Engine damage from timing belt or is it rare

What is your question?

Is it more likely common or uncommon for the timing belt to damage the engine on a 3.3 l v6 Nissan Xterra 2003. I was turning onto a street probably going about 20 miles per hour definitely not over 30 and the engine just cut out and died and I pulled you over and didn't hear any clunk snaps or anything just wouldn't start again I tried change and all kinds of things and I tried starting it a lot but I have it at the shop and they're trying to tell me the engines blown before they even looked at it so but I'm seeing a lot of stories on here about how people got away with it not being blown.