Yes. Carbonfibers only unleashes the full potential when they are long enough. But in filaments they are short and do not build an "intervowen mesh". I am a bad painter but when you bend a part you would want the fibers to overlap each other fiber by around 50% to have enough fibers overlaying to resist the bending. Between layers it's the same. The fibers are so short, that the do not penetrate the next layery and the next layers fibers do not penetrate the underlying layer. The are just layed one on another and fused by the thermal adhesion of the nozzle.

One manufacturer does continuous fiber printing with a dedicated nozzle that extrudes one "endless" carbon line and embeds it in "normal" material. I forgot the name.

I mean the parts are lighter, and have a nice matte look. But printing it is not healthy due to the fibers. They literally fly around during printing and stay in your hands when working with it. That's why I do not print carbon fibers.