If you let your life be ruled by unreasonable fear you will never do anything. Any part can fail catastrophically. Steel can do it. Carbon fiber can do it. One of the greatest predictors in how long anything will last is how YOU take care of it. I've seen fragile aircraft last a long time and I've seen very sturdy ones destroyed very quickly by ham-fisted pilots. Same goes for bikes. You are either hard on your equipment or you aren't. There are so many things that can go wrong that if you worry about them all you can be paralyzed by fear.
You need to separate the likely issues from the unlikely ones. I used to race motorcycles. The last thing I wanted to pop into my head is what would happen if I had a flat at 200+ mph. WHAT IF... You can play these games all day long. For all the aircraft that have had catastrophic failures we've had more people killed by walking down the street. Do YOU do a pre-ride check of your bike every time before you ride?