Yes the material going in still has to be of high quality. Like everything you can get junk carbon.
I helped test a bunch of Carbon products when I was snowmobiling and quad racing at the professional level and when done right it is incredibly strong. In fact I had a set of handle bars made that was the only pair I couldn't bend or break by landing hard. They all broke when crashing but a solid land with upper body supported by the bars.
FYI I used to look like Popeye back then. Forarms where huge. I'd break my wrist now before bars.
Lol