Sounds like he doesn’t make enough working for outside to afford a carbon fiber bike.
I recently flew with a captain that was an engineer designing high end sail boats out of carbon fiber in his previous life. The only thing he brought up, which I could see as a draw back and is not talked about. When you crash a carbon fiber bike unless you have noticeable structural damage, chances are you think it’s good. I know I do. The only way to know for sure if the carbon fiber is structurally sound is to apply it to high heat and look at it with a microscope. The cracks are small and usually can’t be seen with a naked eye, not too mention the paint does a good job at hiding them.